Indecisive Corp. is looking at the following three projects:

Year	Project X	Project Y	Project Z
0	$(150,000)	$(220,000)	$(150,000)
1	54,000	0	(80,000)
2	54,000	0	95,000
3	54,000	115,000	105,000
4	54,000	250,000	140,000

The firm's required return is 13%

a. What is the Net Present Value (NPV) for each?

b. What is the internal rate of return (IRR) for each?

c. What is the discounted payback period (DPB) for each?

d. What project(s) should the company purchase if the projects are independent/mutually exclusive? Explain your reasoning?