Calculate the CTF and CSF for each of the following: (a) Tax rate of 50 percent, CCA of 20 percent, and an after- tax MARR of 9 percent (b) Tax rate of 35 percent, CCA of 30 percent, and an after- tax MARR of 12 percent (c) Tax rate of 55 percent, CCA of 5 percent, and an after- tax MARR of 6 percent