what is the formula to find the answer to this problem?

EXIIBIT 14R-1 Prestent Value of $1:(1+r)K1 Consider the following three investment opportunities: Project I would require an immediate cash outlay of $40,000 and would result in cash savings of $9,000 each year for 5 years Project ll would require cash outlays of $7,000 per year and would provide a cash inflow of $40,000 at the end of 5 years Project III would require a cash outlay of $36,000 now and would provide a cash inflow of $60,000 at the end of 5 years, (lgnore income taxes) Click here to view Exbibit 148-1 and Exhibit 148-2. to determine the appropriate discount factor(s) using the tables provided. Required: The discount rate is 10%. Use the riet present value method to detemine which. if any, of the three projects is acceptable r1[1(1+r)21]