Bill Williams has the opportunity to invest in project A that costs $ 8 comma 100 today and promises to pay $ 2 comma 300, $ 2 comma 400, $ 2 comma 400, $ 2 comma 100 and $ 1 comma 700 over the next 5 years. Or, Bill can invest $ 8 comma 100 in project B that promises to pay $ 1 comma 500, $ 1 comma 500, $ 1 comma 500, $ 3 comma 600 and $ 4 comma 000 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.)