Model interesting roof need help

This project I need to model https://prnt.sc/us4t13
The problem I ran into https://prnt.sc/us4ut3 no flat roof. How to solve this problem?

This looks more like a general construction problem than a SketchUp problem. Upload your SketchUp model so we can see it and help you out.

What version of SketchUp are you really using? Your profile is confusing as there is no SketchUp 20000, yet. You’ve posted in the SketchUp Pro category but your profile says you are using SketchUp Free. What operating system are you using? Mac or Windows?

Screenshot - 10_2_2020 , 3_33_54 PM