Solve the following equations of value (5 points) a) At an annual discount rate of d, payments of S5000 in one year and S3000 in two years have a b) c) d) present value of $7200. Find d. A debt of $8000 is to be repaid with payments of $4000 in 2 years and SX in 3 years. Find X if the loan is charged nominal interest of 5% compounded every three-months. Petra invests $12,000 at a nominal discount rate of 3.6% compounded 2 times a year. When will her investment be worth $16,000? At a nominal rate of interest of i compounded quarterly, a payment of $3000 in 5 years has a present value of $2340. Find