Refer to Data Set 5 in Appendix B and find the best multiple regression equation with number of Senate sittings as the dependent variable. (Don't include the number of each Parliament as an independent variable.) Is this equation suitable for predicting the number of Senate sittings in a given Parliament? Why or why not? [Hint: To efficiently try out the regressions of the dependent variable with various combinations of independent variables, try sending each output to its own (suitably labelled) spreadsheet page. Where the differences between significance levels are very small, the real-world judgment of "best" regression may depend partly on non-mathematical factors, such as the ease of getting data for the different variables.