In a study during the 1970's, it was found that one model of legislative turnover in the country A parliament was described by the following formula: M(t)=442 -0.05t In this formula M(t) was the number of continuously serving members at time t. Here, t=0 represents 1965, t 1 represents 1966, and so on. Use this model to approximate the number of continuously serving members in each year. (a)1968 (b)1973 (c)1977 (a) Find the number of continuously serving members in 1968. (Round to the nearest whole number as needed.) (b) Find the number of continuously serving members in 1973. (Round to the nearest whole number as needed.) (c) Find the number of continuously serving members in 1977. (Round to the nearest whole number as needed.)