help with a and b please!

1. (15 points) Sam is going to graduate from high school soon and is considering earning his Bachelor's over four years. The program costs $25,000 per year in tuition, fees, and texts and he will not be able to work. He recently had a great interview and received an offer for a job after high school graduation with salary and benefits worth $42,000. He expects that the Bachelor's program will get him a job that pays $50,000 per year in salary and benefits. a. If he goes to college, how long will it take Sam to recoup his investment in himself? (5 points) b. Depict these options in an age-earnings profile, assuming Sam is 18 and plans to work until 62. (10 points)