Suppose we are building a regression model to predict Y using X1,X2 and X3. If we want to calculate the VIF values of the predictors, which of the following steps is most appropriate? Group of answer choices use the vif() function with a model that regresses Y on X1 ,X2 and X3 . use the vif() function three times using the following three regression models: 1. Regress Y on X1 2. Regress Y on X2 3. Regress Y on X3