Compute the (a) net present value, (b) internal rate of return (IRR), and (c) discounted payback period (DPB) for each of the following projects. The firms required rate of return is 14 percent. Year Project Alpha Project Beta Which project(s) should be purchased if they are independent? Which project(s) should be purchased if they are mutually exclusive?

0	$268,000	$(300,000)
1	120,000	0
2	120,000	(80,000)
3	120,000	555,000