Build a multiple linear regression model using the mtcars data set. Create a data frame that includes only the following variables: qsec, hp, wt, cyl, carb, and disp of the mtcars data set. (Drop the other 5 variables.) You will use this data frame to build your multiple regression model. List the variable names in this data frame. Using the qsec (the quarter mile time is the number of seconds required for a vehicle to traverse a distance of a quarter mile when accelerating from a standing start)as the dependent variable and the hp, wt, cyl, carb, and disp variables as possible predictors, confirm or disconfirm, statistically and visually, that each predictor is linearly related to the dependent variable. Hint: use cor() and pairs() functions. Build a multiple linear regression model using the qsec as the dependent variable and the hp, wt, cyl, carb, and disp variables as its predictors. Explore the resulting multiple linear regression model