Please use R Programming to answer follow questions:

4. A consumer organization studied the effect of age of automobile owner on size of cash offer for a used

car by utilizing 12 persons in each of three age groups (1=young, 2=middle, 3=elderly) who acted as

the owner of a used car. A medium price, six-year-old car was selected for th experiment, and the

owners solicited cash offers for this car from 36 dealers selected at random from the dealers in the

region. Randomization was used to assign the dealers to the owners. The offers (in hundred dollars)

are in the file UsedCar.csv.

a. Import the data from the UsedCar.csv, and display a few rows.

b. Display the levels of the explanatory factor Age Group. Hint: You might need to use factor.

c. Change the levels of the explanatory factor Age Group to Young, Middle, Elderly, instead of

1, 2, 3.

Hint: levels=c("Young", "Middle", "Elderly")

d. Give a comparative boxplot (with an overlay of a jitter plot), to visualize the distribution of the offer

according to age group.

e. Give a table a group statistics that includes the mean and the standard deviation of the offer according

to age group. Round the statistics at 3 digits.