pleSe show calculation

1. Find the present value of the following cash flows. Assume r= 10%. Year Cashflow 1 $1300 28500 31480 4 1500 2. Investment X offers to pay you $5,300 per year for 10 years. Investment Y offers to pay you $8,100 per year for 8 years. Investment Z offers to pay you $9,000 per year for 8 years with the first payment occurring in year 4. Assume r = 8%, which investment is most valuable