At a growth (interest) rate of 9 percent annually, how long will it take for a sum to double? To triple? (Use o Finenciol calculator to arrive at the onswers. Round the final answers to the nearest whole year.) Determine the amount of money in a savings account at the end of three years, given an initial deposit of $6.500 and an 12 percent annual interest rate when interest is compounded (a) annually, (b) semiannually, and ( d quarterly. (Use a Financial calculator to orrive ot the onswers. Round the finol onswers to the nearest whole dollar.) Calculate the effective annual interest rate of each compounding possibility (Use a Financial colculator to arrive at the answers. Round the final onswers to 2 decimal places.) Your grandfather has offered you a choice of one of the three following alternatives $15,000 now; $8,000 a year for seven years; or $112,000 at the end of seven years. (Use a Financiol calculator to arrive at the answers. Round the final answers to the nearest whole dollar.) a-1. Assuming you could earn 9 percent annually, compute the present value for the following amounts. 0.2. Which alternative should you choose? $112,000 received at the end of seven years $8,000 received each year for seven years $15,000 received now b-1. If you could earn 12 percent annually, compute the present value for the following amounts. $112,000 received at the end of seven years $8,000 received each year for seven years $15,000 received now b-1. If you could earn 12 percent annually, compute the present value for the following amounts. b-2. Which alternative should you choose? $112,000 received at the end of seven years $8,000 received each year for seven years $15,000 received now