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4. (15 pts) Given the following cash flows for an expansion project, and a required return (cost of capital, risk adjusted-discount-rate) of 20%, answer the questions below. Shark Attack 20% (600,000) Initial Outlay OCF1 OCF2 OCF3 OCF4 OCF5 OCF6 OCF7 OCF8 150,000 150,000 150,000 150,000 150,000 150,000 250,000 a. Payback period? (The firm has established a 5 year payback period) b. What is the project's projected NPV? c. What is the project's projected Profitability index? d. What is the project's projected internal rate of return