Suppose your firm is considering two mutually exclusive, required projects with the cash flows shown below. The required rate of return on projects of both of their risk class is 9 percent, and that the maximum allowable payback and discounted payback statistic for the projects are 2 and 3 years, respectively. Time Project A Cash Flow 0 1 2 -21,000 11,000 31,000 -31,000 11,000 21,000 2,000 51,000 Project B Cash Flow Use the NPV decision rule to evaluate these projects; which one(s) should be accepted or rejected?