Problem Definition: You plan to make an investment on wind power. For this purpose, you have collected the average wind speed data at 10 meters elevation from the ground (measured through years) corresponding to different coordinates (in km ) of a proper geographical region. 1) Fit a multiple polynomial regression in the form of: f(x1,x2)=0+1x1+2x2+3x12+4x22 To do this create two new columns x12 and x22 in Excel (an example is given below), use "analysis toolpak" to fit a regression. Give the multiple regression results and your final equation (with 2 decimal numbers for each coefficient). What do you think about the accuracy of the model (check R2 ), and is there any insignificant variable (check the p-value of each variable)