how to check if sql server agent is running
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I am using sql server 2008 r2. want to find a way to verify if sql server agent is running or not.

I saved my asp.net session into the database. The SQL session provider doesn't actively monitor the Expires column in the session table. Instead, sessions aren't "officially" expired until they are removed from the table, which is done with a SQL Agent job that calls the DeleteExpiredSessions stored procedure. By default, the job is configured to run every 60 seconds.

I am pretty sure my sql server agent is not running. is there a way to check and how do you make it running?