3. Show that the total sum of squares used to calculate the R2 from a simple linear model can be divided in 2 parts '31 '31 2W3; E)2 = :(m: iiz + 20% m2 i=1 i=1 i=1 1Where n . . g = 21:19: ' I}: = be + 5193:; Tips: I 'We can sum and subtract the same element without clumg'ing' the result of the equation [a b} = (a e + r: b). I As long as the model contains an intercept 2:1: 1 E1; = 0 '31 .n ' 22:1 em = 0