Develop query to extract minimum response time and its date stamp, maximum response time and its date stamp

Need assistance in developing a query to extract minimum response time and its date stamp, maximum response time and its date stamp from sample data below. Ideally when the Response Time is greater than 0 then drops to 0 again.

Ideal output would be:
DEVICE          MIN DATETIME       MIN               MAX DATETIME      MAX
ABCDEF        12/10/2014 17:06     875.0 ms      12/10/2014 16:11      917.0 ms
ABCDEF        12/11/2014 11:26     847.0 ms      12/11/2014 9:31        943.0 ms



Sample data (I out in the '<<<MIN', '<<<MAX' for easier identification)
DATE / TIME       Response Time        
12/10/2014 13:36      unknown       
12/10/2014 13:41      unknown       
12/10/2014 13:46      unknown       
12/10/2014 13:51      unknown       
12/10/2014 13:56      unknown       
12/10/2014 14:01      unknown       
12/10/2014 14:06      unknown       
12/10/2014 14:11      unknown       
12/10/2014 14:16      unknown       
12/10/2014 14:21      unknown       
12/10/2014 14:26      unknown       
12/10/2014 14:31      unknown       
12/10/2014 14:36      unknown       
12/10/2014 14:41      unknown       
12/10/2014 14:46      unknown       
12/10/2014 14:51      unknown       
12/10/2014 14:56      unknown       
12/10/2014 15:01      unknown       
12/10/2014 15:06      unknown       
12/10/2014 15:11      899.0 ms       
12/10/2014 15:16      896.0 ms       
12/10/2014 15:21      888.0 ms       
12/10/2014 15:26      890.0 ms       
12/10/2014 15:31      895.0 ms       
12/10/2014 15:36      894.0 ms       
12/10/2014 15:41      887.0 ms       
12/10/2014 15:46      888.0 ms       
12/10/2014 15:51      895.0 ms       
12/10/2014 15:56      897.0 ms       
12/10/2014 16:01      903.0 ms       
12/10/2014 16:06      902.0 ms       
12/10/2014 16:11      917.0 ms       <<<MAX
12/10/2014 16:16      896.0 ms       
12/10/2014 16:21      879.0 ms       
12/10/2014 16:26      882.0 ms       
12/10/2014 16:31      892.0 ms       
12/10/2014 16:36      897.0 ms       
12/10/2014 16:41      900.0 ms       
12/10/2014 16:46      902.0 ms       
12/10/2014 16:51      909.0 ms       
12/10/2014 16:56      887.0 ms       
12/10/2014 17:01      899.0 ms       
12/10/2014 17:06      875.0 ms       <<<MIN
12/10/2014 17:11      unknown       
12/10/2014 17:16      unknown       
12/10/2014 17:21      unknown       
12/10/2014 17:26      unknown       
12/10/2014 17:31      unknown       
12/10/2014 17:36      unknown       
12/10/2014 17:41      unknown       
12/10/2014 17:46      unknown       
12/10/2014 17:51      unknown       
12/10/2014 17:56      unknown       
12/10/2014 18:01      unknown       
12/10/2014 18:06      unknown       
12/10/2014 18:11      unknown       
12/10/2014 18:16      unknown       
12/10/2014 18:21      unknown       
12/10/2014 18:26      unknown       
12/10/2014 18:31      unknown       
12/10/2014 18:36      unknown       
12/10/2014 18:41      unknown       
12/10/2014 18:46      unknown       
12/10/2014 18:51      unknown       
12/10/2014 18:56      unknown       
12/10/2014 19:01      unknown       
12/10/2014 19:06      unknown       
12/10/2014 19:11      unknown       
12/10/2014 19:16      unknown       
12/10/2014 19:21      unknown       
12/10/2014 19:26      unknown       
12/10/2014 19:31      unknown       
12/10/2014 19:36      unknown       
12/10/2014 19:41      unknown       
12/10/2014 19:46      unknown       
12/10/2014 19:51      unknown       
12/10/2014 19:56      unknown       
12/10/2014 20:01      unknown       
12/10/2014 20:06      unknown       
12/10/2014 20:11      unknown       
12/10/2014 20:16      unknown       
12/10/2014 20:21      unknown       
12/10/2014 20:26      unknown       
12/10/2014 20:31      unknown       
12/10/2014 20:36      unknown       
12/10/2014 20:41      unknown       
12/10/2014 20:46      unknown       
12/10/2014 20:51      unknown       
12/10/2014 20:56      unknown       
12/10/2014 21:01      unknown       
12/10/2014 21:06      unknown       
12/10/2014 21:11      unknown       
12/10/2014 21:16      unknown       
12/10/2014 21:21      unknown       
12/10/2014 21:26      unknown       
12/10/2014 21:31      unknown       
12/10/2014 21:36      unknown       
12/10/2014 21:41      unknown       
12/10/2014 21:46      unknown       
12/10/2014 21:51      unknown       
12/10/2014 21:56      unknown       
12/10/2014 22:01      unknown       
12/10/2014 22:06      unknown       
12/10/2014 22:11      unknown       
12/10/2014 22:16      unknown       
12/10/2014 22:21      unknown       
12/10/2014 22:26      unknown       
12/10/2014 22:31      unknown       
12/10/2014 22:36      unknown       
12/10/2014 22:41      unknown       
12/10/2014 22:46      unknown       
12/10/2014 22:51      unknown       
12/10/2014 22:56      unknown       
12/10/2014 23:01      unknown       
12/10/2014 23:06      unknown       
12/10/2014 23:11      unknown       
12/10/2014 23:16      unknown       
12/10/2014 23:21      unknown       
12/10/2014 23:26      unknown       
12/10/2014 23:31      unknown       
12/10/2014 23:36      unknown       
12/10/2014 23:41      unknown       
12/10/2014 23:46      unknown       
12/10/2014 23:51      unknown       
12/10/2014 23:56      unknown       
12/11/2014 0:01      unknown       
12/11/2014 0:06      unknown       
12/11/2014 0:11      unknown       
12/11/2014 0:16      unknown       
12/11/2014 0:21      unknown       
12/11/2014 0:26      unknown       
12/11/2014 0:31      unknown       
12/11/2014 0:36      unknown       
12/11/2014 0:41      unknown       
12/11/2014 0:46      unknown       
12/11/2014 0:51      unknown       
12/11/2014 0:56      unknown       
12/11/2014 1:01      unknown       
12/11/2014 1:06      unknown       
12/11/2014 1:11      unknown       
12/11/2014 1:16      unknown       
12/11/2014 1:21      unknown       
12/11/2014 1:26      unknown       
12/11/2014 1:31      unknown       
12/11/2014 1:36      unknown       
12/11/2014 1:41      unknown       
12/11/2014 1:46      unknown       
12/11/2014 1:51      unknown       
12/11/2014 1:56      unknown       
12/11/2014 2:01      unknown       
12/11/2014 2:06      unknown       
12/11/2014 2:11      unknown       
12/11/2014 2:16      unknown       
12/11/2014 2:21      unknown       
12/11/2014 2:26      unknown       
12/11/2014 2:31      unknown       
12/11/2014 2:36      unknown       
12/11/2014 2:41      unknown       
12/11/2014 2:46      unknown       
12/11/2014 2:51      unknown       
12/11/2014 2:56      unknown       
12/11/2014 3:01      unknown       
12/11/2014 3:06      unknown       
12/11/2014 3:11      unknown       
12/11/2014 3:16      unknown       
12/11/2014 3:21      unknown       
12/11/2014 3:26      unknown       
12/11/2014 3:31      unknown       
12/11/2014 3:36      unknown       
12/11/2014 3:41      unknown       
12/11/2014 3:46      unknown       
12/11/2014 3:51      unknown       
12/11/2014 3:56      unknown       
12/11/2014 4:01      unknown       
12/11/2014 4:06      unknown       
12/11/2014 4:11      unknown       
12/11/2014 4:16      unknown       
12/11/2014 4:21      unknown       
12/11/2014 4:26      unknown       
12/11/2014 4:31      unknown       
12/11/2014 4:36      unknown       
12/11/2014 4:41      unknown       
12/11/2014 4:46      unknown       
12/11/2014 4:51      unknown       
12/11/2014 4:56      unknown       
12/11/2014 5:01      unknown       
12/11/2014 5:06      unknown       
12/11/2014 5:11      unknown       
12/11/2014 5:16      unknown       
12/11/2014 5:21      unknown       
12/11/2014 5:26      unknown       
12/11/2014 5:31      unknown       
12/11/2014 5:36      unknown       
12/11/2014 5:41      unknown       
12/11/2014 5:46      unknown       
12/11/2014 5:51      unknown       
12/11/2014 5:56      unknown       
12/11/2014 6:01      unknown       
12/11/2014 6:06      unknown       
12/11/2014 6:11      unknown       
12/11/2014 6:16      unknown       
12/11/2014 6:21      unknown       
12/11/2014 6:26      unknown       
12/11/2014 6:31      unknown       
12/11/2014 6:36      unknown       
12/11/2014 6:41      unknown       
12/11/2014 6:46      unknown       
12/11/2014 6:51      unknown       
12/11/2014 6:56      unknown       
12/11/2014 7:01      unknown       
12/11/2014 7:06      unknown       
12/11/2014 7:11      unknown       
12/11/2014 7:16      unknown       
12/11/2014 7:21      unknown       
12/11/2014 7:26      unknown       
12/11/2014 7:31      unknown       
12/11/2014 7:36      unknown       
12/11/2014 7:41      unknown       
12/11/2014 7:46      unknown       
12/11/2014 7:51      889.0 ms       
12/11/2014 7:56      889.0 ms       
12/11/2014 8:01      889.0 ms       
12/11/2014 8:06      902.0 ms       
12/11/2014 8:11      894.0 ms       
12/11/2014 8:16      875.0 ms       
12/11/2014 8:21      873.0 ms       
12/11/2014 8:26      878.0 ms       
12/11/2014 8:31      887.0 ms       
12/11/2014 8:36      906.0 ms       
12/11/2014 8:41      883.0 ms       
12/11/2014 8:46      886.0 ms       
12/11/2014 8:51      901.0 ms       
12/11/2014 8:56      886.0 ms       
12/11/2014 9:01      884.0 ms       
12/11/2014 9:06      880.0 ms       
12/11/2014 9:11      875.0 ms       
12/11/2014 9:16      856.0 ms       
12/11/2014 9:21      898.0 ms       
12/11/2014 9:26      857.0 ms       
12/11/2014 9:31      943.0 ms       <<<MAX
12/11/2014 9:36      918.0 ms       
12/11/2014 9:41      871.0 ms       
12/11/2014 9:46      876.0 ms       
12/11/2014 9:51      875.0 ms       
12/11/2014 9:56      891.0 ms       
12/11/2014 10:01      879.0 ms       
12/11/2014 10:06      877.0 ms       
12/11/2014 10:11      861.0 ms       
12/11/2014 10:16      900.0 ms       
12/11/2014 10:21      893.0 ms       
12/11/2014 10:26      885.0 ms       
12/11/2014 10:31      894.0 ms       
12/11/2014 10:36      890.0 ms       
12/11/2014 10:41      884.0 ms       
12/11/2014 10:46      870.0 ms       
12/11/2014 10:51      889.0 ms       
12/11/2014 10:56      883.0 ms       
12/11/2014 11:01      865.0 ms       
12/11/2014 11:06      888.0 ms       
12/11/2014 11:11      896.0 ms       
12/11/2014 11:16      854.0 ms       
12/11/2014 11:21      868.0 ms       
12/11/2014 11:26      847.0 ms       <<<MIN
12/11/2014 11:31      884.0 ms       
12/11/2014 11:36      875.0 ms       
12/11/2014 11:41      890.0 ms       
12/11/2014 11:46      878.0 ms       
12/11/2014 11:51      893.0 ms       
12/11/2014 11:56      unknown       
12/11/2014 12:01      unknown       
12/11/2014 12:06      unknown       
12/11/2014 12:11      unknown       
12/11/2014 12:16      unknown       
12/11/2014 12:21      unknown       
12/11/2014 12:26      unknown       
12/11/2014 12:31      unknown       
12/11/2014 12:36      unknown       
12/11/2014 12:41      unknown       
12/11/2014 12:46      unknown       
12/11/2014 12:51      unknown       
12/11/2014 12:56      unknown       
12/11/2014 13:01      unknown       
12/11/2014 13:06      unknown       
12/11/2014 13:11      unknown       
12/11/2014 13:16      unknown       
12/11/2014 13:21      unknown       
12/11/2014 13:26      unknown       
12/11/2014 13:31      unknown       


Thanks!