14pts 5. An investor deposits $5000 in a retirement account that returns 2.9% at the end of each year. a. Write a function that models the amount of mone, A, in the account at the endt years. b. Use that model to find the amount of money after 3 years. c. Use that function to determine when the account will reach $20,000, assuming a constant interest rate. Round your final answer to nearest year if needed