2. One gloomy day in 1982 a boat carrying N asylum-seeking married couples left a port near Haiphong (a place in northern Vietnam) and headed for Hongkong. (a) It was known that the Hongkong government was prepared to take in a total of M (< 2N) refugees and repatriate all those who were in excess of the quota. Assume that the M refugees who were granted asylum were selected randomly. (i) What is the expected number of repatriated couples? (ii) What is the expected number of couples who became separated as a result of this selection procedure?