I need the explanation

13- Perform multiple linear regression analysis with Period, DIFF, and ADV as independent variables. Formulate the equation and find MAD. Which variable is the most significant predictor of demand? Rank the independent variables based on their degree of contribution to the model. Observe significant F,R, R-squared, and p-values and explain. SUMMAQY OUTPUT \begin{tabular}{|l|r|} \hline \multicolumn{2}{|c|}{ Regression Stotistics } \\ \hline Multiple R & 0.97065739 \\ \hline R Square & 0.94217577 \\ Adjusted R So & 0.9396247 \\ \hline Standard Erro & 0.75149855 \\ \hline Observations & 72 \\ \hline \end{tabular} ANONA \begin{tabular}{|l|r|rr|r|r|} \hline & of & \multicolumn{1}{c}{ SS } & MS & F & Signililconcref \\ \hline Regression & & 625.730426 & 208.576809 & 369.325865 & 5.2739142 \\ \hline Residual & 68 & 38.4030048 & 0.56475007 & & \\ \hline Total & 71 & 664.131431 & & & \\ \hline \end{tabular} AESIDUAL OUTPUT