Compute.
7 min 17 sec+ 61 sec+ 7 min 17 sec
A15 min 35 sec
B 14 min 18 sec
C12 min 35 sec
D15 min 65 sec
7 min 17 sec+ 61 sec+ 7 min 17 sec
A15 min 35 sec
C12 min 35 sec
D15 min 65 sec