You would like to save for a car. You would like to have $20,000 saved in 4 years. You decide to make payments at the end of each month into an account earning 4.6% interest per year, compounded monthly for the next 4 years in order to accumulate the desired amount. a) What size payments should be made? Round to the Penny $ b) How much total interest did they earn on the investment over 4 years? Round to the penny $