4. A company has an obligation to pay its CEO $25,000 when she retires in 5 years. At a 5% interest rate, what is the amount of the present value on the balance sheet? 5. What is the payback period on an investment which costs $31,800 and is expected to decrease costs by $4,200 in each of the next 10 years? a) 8.0 years b) 7.6 years c) 0.76 years d) 1.32 years