please show work

7. Assume a firm is planning to buy some new equipment. Use the following information to figure out the net present discounted value of ion investment expenditure (each machine bought) and, therefore, how many units of capital (machines) the firm should buy. Assume each machine has a life span of three years. Make sure to figure out the present discounted value of each machine Mght and to show your work Pk: $16,500 r =10% MRP of first machine bought: $9,500 MRP of second machine bought: $8,000 MRP of third machine bought: $6500