Uneven cash flow stream

please answer a/b of the question

(2-14) a. Find the present values of the following cash flow streams. The appropriate Uneyen Caah interest rate is 8%. OHint it is fairly easy to work this problem dealing with the Flow Streom individual cash flows. However, if you have a financial calculator, read the section of the manual that describes how to enter cash flows such as the ones in this problem. This will take a little time, but the investment will pay huge dividends throughout the course. Note, if you do work with the cash flow register, then you must enter CF0=0.) b. What is the value of each cash flow stream at a 0% interest rate