Get a list of all workflows in "Running" state and terminating "running" workflows

Hello,

I am posting to see if anyone can help me with PowerShell scripts to:

1. Get a report of all 2013 workflows in "Running" state across a web application and across a site collection.
2. to terminate all 2013 workflows in "running" state across a web application and a cross a site collection

The web/application and site collection should be a choice.

Any help would be appreciated.

Thank you,

Rumi