2. The manager of a stockroom in a factory knows that the mean daily demand Y (number of times used), for a particular tool is 0.6 with variance 0.44 and My(t) = 0.5 + 0.4e+0.1e2t. It costs the factory R100 each time the tool is used. Let cost be represented by Z. a) Determine the pmf of Y. b) Calculate the expected daily cost. c) Calculate the variance in daily cost. d) Calculate the mgf of daily cost.