Envoy Textiles Limited is considering purchasing a new machine that costs $37500. The machine is expected to generate after-tax cash flows equal to $15000, $19000, and $14000 during its three-year life. Envoy Textiles requires such investments to earn a return equal to at least 11 percent. (3 marks) a. What is the machine's NPV? Should the company purchase the machine? Why? b. What is the machine's internal rate of return (IRR)? Should the company purchase the machine? Why? What is the machine's traditional payback period (PB)? C