Net benefit of a college education

A high school graduate is considering whether to attend college. He predicts that his earnings if she doesn't attend college will be $25,00 per year (real). he predicts that his earning after four years of college will be $37,000. tuition costs are $5,000 per year. assume that college begins at age 18 and ends at age 22, and that he will work until age 65.

a. prepare out the equation used to evaluate the net benefit of a college education, for discount rate r.

b. if the discount rate is 5%, what is the value of the net benefit (which could be positive or negative) of a college education?

c. what is the internal rate of return for the college investment that this person faces?