Q: Macbook air IMovie accidentally deleted

Hi everyone,

So I recently had to factory reset my Macbook air and when I reinstalled software and got everything set back up I realized my IMovie had been deleted for whatever reason. I have checked the purchases tab in the app store and it is not there. I really don't want to spend $14.99 on an app that originally came with my computer. If anyone could help me find a way to reinstall IMovie for free that would be great.