1. Suppose a complete second-order model Y=l30+l31x1+|32x2+|33x1x2+4x12+65x22+e was t to n = 24 data points. > sum( 1m( y ~ 1 )$residuals"2 ) [1] 36 O > sum( 1m( y ~ x1 + x2 ) $residua13'2 ) [l] 126 > sum( 1m( y ~ x1 +x2 + I (x1*x2) )$residuals"2 ) [l] l 00 > sum( 1m( y ~ x1 + x2 + I (x1*x2) + I (x1"2) +I (x2'2) )$residuals"2 ) [1] 72 a) Perform the \"significance of the regression\" test at a 5% level of signicance. Report the null hypothesis, the value of the test statistic, the critical value(s), and the decision