Sound city sells the cleartone-400 satellite car radio. for this radio, historical sales records over the last 100 weeks show 4 weeks with no radios sold, 33 weeks with one radio sold, 39 weeks with two radios sold, 12 weeks with three radios sold, 8 weeks with four radios sold, and 4 weeks with five radios sold. calculate μx, σx2, and σx, of x, the number of cleartone-400 radios sold at sound city during a week, using the estimated probability distribution.