Hello dear writer What is required of me in this group project is only Task Four

Hello dear writer
What is required of me in this group project is only Task Four and its calculations
All the parts before mine were solved by the group’s students, and only my part remained
In addition, I was able to communicate with another group that solved the part that I needed to solve, but I am not sure of the solution and I need a different form.
The doctor told me that I might need the book for some criteria and calculations
Please solve Task 4 only
Thanks