SolidWorks | Challenge 21

This is the 21th exercise of the 30 Days Solidworks Challenge.
In the next coming days, you will learn all Solidworks 2D and 3D tools that are required for you to start with SolidWorks.

Here is the quiz question for this video, Answer it in the comment section.
1. How many sketches were made to create this design?
2. How many planes are used to create this design?
3. Where do you change the unit system?