(Multiple Choice) - must show work for this question, including the formulas you use to arrive at the answer, if any.

3. The probability distribution for the number of cell phones per household in a small town is shown below. Cell phones 0 1 2 3 4 5 6 Probability 0.020 0.140 0.272 0.292 0.168 0.076 0.032 Which of the choices below correctly states the mean and the standard deviation for this probability distribution? (a) u = 0.5,0 = 1.4 (b) u = 2.8,0 = 1.3 (c) u = 1.3,0 = 2.8 (d) u = 1.3,0