Unequal project lives

Luthering Corp. has to choose between two mutually exclusive projects. If it chooses project A$,$ Luthering Corp. will have the opportunity to make similar investment in three years. However, if it chooses project $B,$ it will not have the opportunity to make a second investment. The following tab lists the cash flows for these projects. If the firm uses the replacement chain $($common life$)$ approach, what will be the difference between the net present value $($NPV$)$ of project A and project B$,$ assuming that both projects have a weighted average cost of capital of $14\%?$

Cash Flow

$\backslash$table$[[$Project A$,,$Project B$,],[$Year $0$:$,-$$$15,000,$Year $0$:$,-$$$45,000$