The problem is attached. The part about human capital/Becker shouldn't confuse you, this is no different than if it were in a finance class. Becker just says that we can think of education as in investment in "human capital" since it will increase our earnings later in life - but to be rational that investment has to pay off more than the opportunity/indirect costs of college + the direct/tuition costs.
Please use a spreadsheet
I scanned in the formulas I have in case you need them.