Airplane passengers can fly either economy class ( X = 0 ) or business class ( X = 1 ) , and can bring up to two suitcases on an airplane. Let Y E 10, 1, 23 denote the number of suitcases. A survey asks for the travel class and number of suitcases carried by two hundred randomly chosen passengers . The results are in the table: Y = O Y = 1 Y = 2 Total : X = 0 38 72 59 169 X = 1 20 10 1 31 Total : 58 82 60 200 1. Find point estimates of the mean and the variance of the number of suitcases carried by passengers traveling economy class. Do the same for passengers traveling business class