Mutiple linear regression II. This part consists of Project 7.37 in the book, with the following changes. 1. Take out variable X6, that is, you will not consider the total serious crimes (X6) as a predictor in this project. Make the corresponding changes in parts a–c. 2. Add the following part: d. Compute three additional coe?cients of partial determination: R2Y,X3,X4|X1,X2, R2Y,X3,X5|X1,X2, and R2Y,X4,X5|X1,X2. Which pair of predictors is relatively more important than other pairs? Use the F test to ?nd out whether adding the best pair to the model is helpful given that X1,X2 are already included.Need the answer in r code.