5. Word problems: a. You plan to invest $2,100 in 3 years when you graduate. Assuming you eam 7.8% per year, calculate how much you will have 13 years from now. b. You will invest $5,000 today and another $5,000 in 3 years. Assuming an interest rate of 9.3%, calculate how much you will have in total in 10 years. C. Assume that a college education cost $3,800 per semester 40 years ago, and that inflation has averaged 2.7% per year over those 40 years. Calculate the expected cost of a semester for a college education today. d. You want to have $60,000 in 10 years. Assuming you can invest your money at 7.8%, calculate how much you must invest today. [Continued from question d.) You want to have $60,000 in 11 years. Assuming you can invest your money at 8.8% instead of 7.8%, calculate how much more or less money you must invest today