Which of the following statements is/are true? a. The NPV is the value obtained by discounting all the cash outflows and inflows for the project by the companies MARR and then adding up the values. b. The NPV calculation requires at least one sign change in the cash flow to be computed c. A negative NPV means the cash inflows from a project will yield a return in excess of the investment Both a & b Both a &c Both b&c All of the above (i.e. a, b & c)