Suppose your firm is considering two mutually exclusive, required projects with the cash flows shown as follows. The required rate of return on projects of both of their risk class is 10 percent, and the maximum allowable payback and discounted payback statistic for the projects are two and a half and three and a half years, respectively. Time Project A Cash Flow -1,000 Project B Cash Flow -500 300 200 400 400 700 300 Calculate the payback and use the payback decision rule to evaluate these projects, which one(s) should be accepted or rejected and why