please show work in equation form (not on excel)

. Edelman Engineering is considering a piece of equipment in this year's capital budget. The cash outlay for the truck is $21,400. The firm's cost of capital, WACC, is 14 percent. The expected cash inflows are as follows: YEAR Free Cash Flow 1 $5,500 2 $5,500 3 $5,500 4 $5,500 $7,500 a. Calculate the NPV. Calculate the MIRR b. 5