Powershell script to kill process based on processor utilization

I'm using this command to kill winword.exe processes on a server we have that uses MS Word for a document conversion process.  Because of a bug in this process, the winword.exe process is being left open when the conversion should close it after it completes.  Until a bug fix is released for the third-party app involved, I would like to devise a method to kill these processes.  I know I can use this power shell command:

stop-process -Name winword* -force

it works just fine.  However, I'd like to automate it if possible.  I was wonder if it would be possible to put this in a PowerShell script that will do the following:

1. run the stop-process command for winword.exe if a certain total processor threshold is crossed...let's say 75%.
2. close all winword.exe processes older than 2 minutes.
3. send an alert via email when script is run

I'm still learning pshell, and I know this is a little fancier than what I'm used to doing, so i was wondering if anyone had any ideas on how to accomplish these goals.

Thanks!