1)
a) E = 6500·1.008^7 + 300·(1.008^7 - 1) / (1.008 - 1) = 9023.93
b) E = 6500·1.008^7 - 300·(1.008^7 - 1) / (1.008 - 1) = 4721.78
c) E = 6500·1.008^7 + 300·(1.008^7 - 1)·1.008 / (1.008 - 1) = 9041.14
d) E = 6500·1.008^7 - 300·(1.008^7 - 1)·1.008 / (1.008 - 1) = 4704.57
2)
B = 2500·(1.08^12 - 1)·1.08 / ((1.08 - 1)·1.08^12) = 20347.41
3)
R = 8000·1.04^8·(1.04 - 1) / (1.04^8 - 1) = 1188.22