3 (30 points): Considering the net cash flows of two investment alternatives as follows: A B 0 -2000 -2000 1 3200 780 2 -1100 780 3 780 (a) Please calculate IRR of two alternatives. Is it possible to determine the better alternatives? (b) Please draft the diagram of the relationship between NPW and IRR for alternative B. (c) If the repeatability assumption is available and MARR = 6%, which alternative should be preferred