1. The number of pumps in use at both a six-pump station (station 1) and a four-pump station (station 2) will be determined. Give the possible values for each of the following random variables:
2. (a) T = the total number of pumps in use
3. (b) X = the difference between the numbers in use at stations 1 and 2
4. (c) U = the maximum number of pumps in use at either station (d) Z = the number of stations having exactly two pumps in use