What should I do if I am stuck on an Electrical Engineering homework problem?

What should I do if I am stuck on an Electrical Engineering homework problem? What should I do in order to get into the task of getting answers to the question? Currently I am stuck on this. Im wondering when something in the answer gets obvious or gets out of line. Having a few minutes to ref-view through 6 pages of Wikipedia, I will try to find your answer. I’ll ask you, what is the most good answer to this question? I did something like this: