Knowledge and Understanding At several branches of the Trillium Bank transaction times with tellers during a two-hour period were recorded Time, in the table, has been rounded to the nearest minute. Time (min) 1 2 P 5 6 or more Frequency 20 12 9 5 3 (a) Define the random variable, X. (b) Create a probability distribution from these data. (c) Determine the expected transaction time at the Trillium Bank