4. Future Values. (a) The future value of lump-sum investment of $4,000 in four years that eams 6 percent. (b) The future value of $1,500 saved each year for three years that earns 6 percent. (c) A person who invests $1,200 each year finds one choice that is expected to pay 3 percent per year and another choice that may pay 4 percent. What is the difference in return if the investment is made for four years? (c) A person who irvests $1.200 each year finds one choice that is expected to pay 3 percent per year and another choice that may pay 4 percent. What is the difference in return if the investment is made for four years? (d) The amount a person would need to deposit today with a 5 percent interest rate to have $2.000 in three years