data is built in r program using ToothGrowth

a) Consider the R build in data ToothGrowth. Create a table for len and graph a pie chart of it. b) Aggregate len based on dose using the mean function. Create a dot chart and bar plot. c) Create a box plot of len. What are its 25, 50, and 75 quantiles? d) Use ggplot2 tools to create a box plot of len with different supp categories, i.e. for each category of supp, we should have a box