Each week your business receives orders from customers who wish to have air-conditioning units installed in their homes. from past data, you estimate the distribution of the number of units ordered in a week x to be as follows. units ordered x 0 1 2 3 4 5 probability 0.02 0.13 0.26 0.34 0.15 0.1 (a) sketch a probability histogram for the distribution of x. (b) calculate the mean of x and mark it on the horizontal axis of your probability histogram. e(x) = (c) if you hire workers sufficient to handle the mean demand, what is the probability that you will be unable to handle all of a week's installation orders?