Delta Energy plans to invest in a new solar plant, which requires an initial investment of $200,000. The expected cash inflows over the next five years are as follows:

Year	Cash Flows
0	-200,000
1	50,000
2	50,000
3	50,000
4	50,000
5	50,000

a. Calculate the payback period for the solar plant project. b. Compute the NPV and IRR if the cost of capital is 10%.