BK's nutrition sheet lists many variables. Here's a multiple regression to predict calories for Burger King Foods from Protein content (g), Total Fat (g), Carbohydrate (g), and Sodium (mg) per serving:

a) Do you think this model would do a good job of predicting calories for a new BK menu item? Why or why not?
b) The mean of Calories is 453.98 with a standard deviation of 234.63. Discuss what the value of 5 in the regression means about how well the model fits the data.
c) Does the R2 value of mean that the residuals are all almost equal to zero?