Consider the following projects Cash Flows (5) Project 61 C2 -3,000 3, e -6,000 3,000 3,000 -7,500 3, eee 2,5ee C3 e 6,000 e C5 e 3, eee 3, 3, eee 3,000 a. If the opportunity cost of capital is 10%, which project(s) have a positive NPV? b. Calculate the payback period for each project c. Which project(s) would a firm using the payback rule accept if the cutoff period is three years? d. Calculate the discounted payback period for each project e. Which project(s) would a firm using the discounted payback rule accept if the cutoff period is three years