Consider the cars data set in R. a. Use the plot function to plot stopping distance as a function of speed. b. Use the Im() function to produce a linear regression model where the response variable is stopping distance and the predictor is speed. Write the equation of the regression line. C. Produce a plot showing both the data and the regression line. d. Use the regression line to predict the stopping distance for a speed of 19 MPH. e. Use the regression line to predict the stopping distance for a speed of 50 MPH.