Question 593923
1.15% x 4 = 0.04
1.3% x 4 = 0.002
1.35% x = 0.054
1.2% x 4 = 0.096

0.04+0.002+0.054+0.096=0.398

1.15+1.3+1.35+1.2=5

0.398/5 = 8% This is answer.