a. Find the present values of the following cash flow streams. The appropriate interest rate is 8%. (Hints It is fairly easy to work this problem dealing with the 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 that if you do work with the cash flow register, you must enter CF4=0.) b. What is the value of each cash flow stream at a 0% interest rate