Ricky is considering the purchase of an ice cream machine for $8000 and he plans to borrow the money from his grandmother at 7% interest. He believes he can sell the ice cream machine for $1500 at the end of three years. He expects the ice cream machine to generate the following cash flows: year 1=$3000 year 2= $5500 year 3= $2800 a. What is the NPV of the investment? b. What is the internal rate of return c. Should Ricky purchase the machine?