RTC$,$ Inc. is considering two investment projects, each of which requires an up$-$front cash expense of $$24$ million. You estimate that the cost of capital is $7\mathrm{.}5\%$ and that the investments will produce the following after$-$tax cash flows for next $3$ years:

Year Project A Project B

$1$ $ $5,000,000$ $ $20,000,000$

$2$ $$10,000,000$ $ $10,000,000$

$3$ $$20,000,000$ $ $6,000,000$

What are the two projects' net present values, assuming the cost of capital is $7\mathrm{.}5\%?$ which project should you accept if they are mutually exculsive? which project should you accept if they are independent of each other?