Hello, Im working on a course with a mentor.

Hello, Im working on a course with a mentor. I've made some progress on this task, but need some help to fix some remaining issues with it. In the attachment you will find the problem Im asked to solve, my most recent work on the problem, and the notes from my mentor as to what I have wrong with my work. You will also find the graph that is referred to in the problem.What I need is for you to look at the problem, read my submission and mentor comments and assist me to address the areas I am lacking based on the mentors feedback so I can provide the correct and comprehensive answer