An investor needs $20,000 in 13 years (a) What amount should be deposited in a fund at the end of each quarter at 6% compounded quarterly so that there will be enough money in the fund? (b) Find the investor's quarterly deposit if the money is deposited at 7.9% compounded quarterly GIIB (a) The deposit should be $ (Do not round until the final answer. Then round to the nearest cent as needed.)