use r studio pls

Problem 1. This problem uses the mpg data set in the ggplot2 package. (a) Which variables in mpg are categorical? Which variables are continuous? Use the str() function or the glimpse() function (b) What does the stroke aesthetic do? (Hint: use ?geom_point). (c) Use ggplot2 to create a scatterplot of displ (on the y-axis) vs hwy (on the x-axis), setting stroke to be a value that is different from the default. (d) Add the title "Scatterplot of engine displacement (displ) vs highway miles per gallon (hwy)" to the plot in part (c). Hint: use ? labs