I= 6%
Time Cash flow PVIF @ 6% PV of cash flow
0 0 1 0
1 0 0.9434 0
2 400 0.8900 356.00
3 350 0.8396 293.87
4 300 0.7921 237.63
5 250 0.7473 186.81
6 200 0.7050 140.99
7 150 0.6651 99.76
8 150 0.6274 94.11
9 150 0.5919 88.78
10 150 0.5584 83.76
11 150 0.5268 79.02
Sum 1660.73
(b) Uniform equivalnece 210.57
(c) Gradient equivalance 47.63