New Steam Game - How to find out the Minimum System Requirements

I was wondering how I would find the minimum system requirements to run my game.

I need to fill it out for my steam page but have no idea what to put.

Is there some kind of tool or way to figure this out?

My game runs on mobile devices so I’m guessing the PC and Mac requirements are going to be very low.
Here is a pic of what I need to fill out.

Here are the minimum system requirements that we support with the engine:

https://unity3d.com/unity/system-requirements

However, that does not account for any advanced/heavier content you may have inside your game.