Personal Finance Problem 10-4 Long-term investment decision, payback method Bill Williams has the opportunity to invest in project A that costs $9,000 today and promises to pay annual end-of. year payments of $2,200,$2,500,$2,500,$2,000, and $1,800 over the next 5 year. Or, Bill can invest $9,000 in project B that promises to pay annual end-of-year par: ments of $1,500,$1,500,$1,500,$3,500, and $4,000 over the next 5 years. a. How long will it take for Bill to recoup his initial investment in project A ? b. How long will it take for Bill to recoup his initial investment in project B ? c. Using the payback period, which project should Bill choose? d. Do you see any problems with his choice