(a) List the various potential components of a time series data and define them briefly. (b) Using quarterly data of Australian total exports for the period 2000:Q1 to 2007:Q4, the regression output of a trend model is reported below. Exports are defined in terms of thousand dollars. Identify the type of trend model estimated and interpret the coefficient of t. Dependent Variable: EXPORTS Method: Least Squares Sample: 2000Q1 2007Q4 Included observations: 32 Variable Intercept t R-squared Adjusted R-squared S.E. of regression Sum squared residuals Coefficient -4063.533 361.879 0.937308 0.936818 3539.460 1.60E+09 Std. Error t-Statistic 617.2975 -6.582779 8.272283 43.74599 Mean dependent var S.D. dependent var Akaike info criterion Schwarz criterion Prob. 0.0000 0.0000 19277.68 14081.19 19.19660 19.24072