Consider the following data frame datacars (a few rows shown), and the graph below generated with "ggplot2" functions: mpg cyl disp transmi ssion Mazda RX4 Wag 21.0 6 160 auto matic Datsun 710 22. 8 4 108 auto matic Hornet 4 Drive 21.4 6 258 m anual Hornet Sportabout 18.7 8 360 m anual MPG and DISP scatterplot Bigger engines consume more fuel automatic manual 35 30 cyl 25 A . . . . mpg (miles per gallon) 20 8 15. 10 100 200 300 400 100 200 300 400 disp (displacement)True or False. a [ Select ] The above plot facets by variable cyl b) [ Select ] The above plot uses geom_scatter() C) [ Select ] Variable cyl is being mapped as size attribute of points d) [ Select ] Variable disp is being mapped to the x-axis e) [ Select ] Variable mpg is being mapped as color attribute of points f) [ Select ] Variable transmission is used as a group aesthetic attribute