How to define warning & Critical threshold values for memory alert and the subject for both the alerts?

Hi,

Can someone help me configuring the memory alert with warning and critical threshold value and the subject for both the alerts should we different, how can we do this?

My current setting is like following:

##### Conditions

WHEN min () OF . query (A, 5m, now) IS ABOVE 50

AND avg () OF query (A, 5m, now) IS ABOVE 80

If the above setting is correct for warning &critical values then where can i change the subject for both the alerts.

Thanks,
Ravi