Question 3 and 4, I am having difficulty answering.

Santa Roberta Clinic has estimated its corporate cost of capital to be 11 percent. What are reasonable values for the project costs of capital for lower-risk, and higher-risk projects? California imaging Center, a not-for-profit business, is evaluating the purchase of new diagnostic equipment. The equipment, which cost $600,000, has an expected life of five years and an estimated salvage value of $200,000 at that time. The equipment is expected to be used 15 times a day for 250 days a year for each year of the project's life. On average, each procedure is expected to generate $80 in cash collections during the first year of use. Thus net revenues for year 1 are estimated at 15 times 250 $80 = $300,000. Labor and maintenance costs are expected to be $100,000 during the first year of operation, while utilities will cost another $10,000 and cash overhead will increase by $5,000 in year 1. The cost for expendable supplies is expected to average $5 per procedure during the first year. All costs and revenues are expected to increase at a 5 percent inflation rate after the first year. The center's corporate cost of capital is 10 percent. Estimate the project's net cash flows over its five-year estimated life. Equipment cost net revenues Less: Labor/maintenance costs Utilities costs Supplies Incremental overhead Operating income Equipment salvage value Net cash flow What are the project's NPV and IRR? (Assume for now that the project has average risk.)