4. (10 points) A firm has $25 million today that it can invest in any or all of the projects listed below. All investments must be made today. Which projects, if any, should the firm invest in and why? Remember that the firm only has $25 million on hand and must pay all investment costs up front. The interest rate is 5%. Project A: Year o Years 1 until forever Investment cost of $15 Sale price: $3 Expected sales (units): 2,000,000 million Cost per unit sold: $1 Other operating expenses: $400,000 Project B: Year 0 Years 1 until forever Investment cost of $15 Sale price: $5 million Expected sales (units): 500,000 Cost per unit sold: $2 Other operating expenses: $400,000 Project C: Year 0 Year 1 Year 2 Year 3 Year 4 Investment Sale price: $2 Sale price: $2 Sale price: $4 Sale price: $3 cost of $15 Expected sales: Expected sales: Expected sales: Expected sales: million 10 million 10 million 10 million 10 million Cost per unit: $1 Cost per unit: $1 Cost per unit: $2 Cost per unit: $2 Other expenses: Other expenses: Other expenses: Other expenses: $5 million $5 million $5 million $5 million