True False: a) T F In a mutually exclusive set of alternatives, one or more of the alternatives out of the group can be chosen. b) T F An investment of $6000 yields a return of $1500 at the end of the next four years. The internal rate of return on this investment is zero percent. c) T F Payback period varies inversely with the benefit-cost ratio: the shorter the payback period, the higher the benefit cost ratio. d) T F $1, 791 ten years from now is equivalent to $900 if the interest rate is 8%. e) T F Cash flows normally include depreciation since it represents a cost of doing business