a. If the interest rate is 4.6% per year, how long will it take for your money to quadruple in value? (Do not your intermediate calculations. Round your answer to 2 decimal places.) Number of years

b. If the inflation rate is 3.3% per year, what will be the change in the purchasing power of your money over this period? (Do not round intermediate calculations. Round your answer to 2 decimal places.) Purchasing power by %.

c: increase or decrease