Compute the capacity in parts per hour of the following:

A. A station with three single machines operating in parallel with 20-minute processing times at each station

B. A balanced line with single-machine stations, all with average processing times of 15 minutes.

C. A four-station line with single-machine stations, where the average processing times are 15, 20, 10 and 12 minutes, respectively for stations 1, 2, 3, 4.

D. A four station line with multi-machine stations, where the number of parallel machines at stations 1, 2, 3, 4 is 2, 6, 10, 3 respectively.The average processing times at stations 1, 2, 3, 4 are 10, 24, 40,18 minutes, respectively.