Suppose your firm is evaluating four potential new investments. You calculate that theseprojects, Q, X, Y, and Z, have the NPV and IRR figures given below: Project Q:  NPV = $1,000  IRR = 16%Project X:  NPV = -$4,000 IRR = 12% Project Y:  NPV = $5,000  IRR = 14%Project Z:  NPV = -$899  IRR = 18%a) Which project(s) should be accepted if they are independent? Clearly explain your reasoning. b) Which project(s) should be accepted if they are mutually exclusive? Clearly explain your reasoning.