Can the query be use to find out which query within a stored procedures that cause slowness?No. It only sees each query as a single and isolated command. If you don't know by the query in which stored procedure it belongs then you'll need to run a trace to capture all SQL commands sequentially and so you can see step by step which stored procedure has been called. If you don't know how to do it, please follow this article that shows you how to do it.
Can the query be use to find out which query within a stored procedures that cause slowness?