Consider a survey concerning the ages of 800 students in a college. The results can be summarized as follows: 320 students were between 18 and 20 years old, 240 students were between 20 and 22 years old, 80 were between 22 and 24 years old, and 160 students were between 24 and 26 years old.
a. Give the frequency distribution of the ages
b. Plot the histogram of the ages
c. Plot the frequency polygon of the ages.