as the director of capital budgeting for denver corporation, you are evaluating two mutually exclusive projects with the following net cash flows: year project x project z 0 $100,000 $100,000 1 50,000 10,000 2 40,000 30,000 3 30,000 40,000 4 10,000 60,000 if denver's cost of capital is 15 percent, you would choose?