please help

Lester's just signed a contract that will provide the firm with annual cash inflows of $28.000, $35.000 and 542.000 over the next three years. Then the firm will receive a $15.000 annuity for five year. Finally, $8.000 annual payment delivered by the contract, is believed to be permanent What is the present value of the perpetuity 2) What is the present value of the annully 3) What is the present value of the first three years cash flows 4) What is the total present value delivered by the contract