Mike, Jim and Bob are all professional fisherman. Mike can catch 21 fish in one hour, Jim can catch twice as much and Bob can catch 50% more than Jim. If the three started to fish together and after 40 minutes Mike and Bob left, how many fish did the three fishermen catch in one hour?
A. 64
B. 72
C. 86
D. 98
E. 112
A. 64
B. 72
C. 86
D. 98
E. 112
