Question 6 20 pts Divide mtcars into three groups of data frames according to the number of cylinders in the car's engine. Make a sub-scatterplots of gas mileage on the y-axis vs. weight on the x-axis for each group (so, three subplots in total). The points should be colored , with 4-cylinder cars colored red, 6-cylinder cars colored blue, and 8-cylinder cars colored green. Then, put three subplots into one single plot by the following layout: 4-cylinder cars on the upper-left corner, 6-cylinder cars on the upper-right corner with the same size, 8-cylinder cars on the bottom with the double size. There is no blank area in the plot. .wisc.edu/courses/273853/quizzes/306766/take 5/8