Long-term investment decision, payback method Personal Finance Problem. Bill Williams has the opportunity to invest in project A that costs $8,600 today and promises to pay $2,300,$2,600,$2,600,$2,100 and $1,700 over the next 5 years. Or, Bill can invest $8,600 in project B that promises to pay $1,300,$1,300,$1,300,$3,400 and $3,900 over the next 5 years. (Hint: For mixed stream cash inflows, calculate cumulative cash inflows on a year-to-year basis until the initial investment is recovered.) a. How long will it take for Bill to recoup his initial investment in project A? b. How long will ht 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? a. For Bili to recoup his initial investment in project A, it will take years. (Round to two decimal places.)