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(b) (c) million of dollars October 1995. 20000 15000 25000 10000 5000 0 1960 Q1 1961 Q2 (a) Define a time series process. 1962 Q3 1963 04 1965 Q1 1966 02 1967 Q3 1968 04 1970 Q1 Explain your observations for the time series data in Figure 1. List down four components usually appear in the time series data. 1971 Q2 1972 03 1973 Q4 Year 1975 Q1 January 1960 - October 1995 Figure 1 Figure 1 shows the quarterly exports of Australian national accounts from January 1960 - Quarterly Australian national accounts exports: millions of dollars from 1976 02 1977 03 1978 Q4 1980 Q1 1981 Q2 1982 03 1983 04 1985 Q1 1986 02 1987 03 1988 04 1990 Q1 1991 Q2 1992 03 1993 Q4 (2 marks) m (2 marks) (1 mark) 1995 Q1