please help solve

1) What is the relationship between discounting and compounding? 2) Compute the following: a) You invest $15,000 today at 9 percent per year. How much will you have after 15 years? b) What is the current value of $120,000 after 10 years if the discount rate is 12 percent? c) You invest $3,000 a year (at the end of a period) for 20 years at 11 percent. How much will you have after 20 years? 3) How much should you set aside each year (end of the period) to accumulate $70,000 after 15 years? The interest rate is 10 percent. * Use the PV-FV tables to solve all problems and show how you arrived at your