5. (Problems involving Normal Distribution) The table show the mean values of the cash flows associated with some investment. The investment is known and is not a random variable. The other cash flows are independent random variables with Normal distributions. In each case the standard deviation of the cash flow is one quarter of the mean value (=0.25). Compute the mean and standard deviation of the NPW of the cash flow. Accept or reject the investment based on expected value. Compute the probability that this investment yields a return greater than the MARR. The MARR is 20%