A firm is evaluating two independent projects utilizing the internal rate of return technique. Project X has an initial irvestment of $80,000 and cash inflows at the end of each of the next five years of $25,000. Project Z has a initial investment of $120,000 and cash inflows at the end of each of the next four years of $0,000. The firm should accept both if their cost of capital is 15 percent at the maximum. accept only Z if their cost of capital is 15 percent at the maximum. accept only X if their cost of capital is 15 percent at the maximum. reject both if their cost of capital is 12 percent at the maximum