A survey given to a sample of 200 college students contained questions about the following variables. For each variable, identify the kind of graph that should be used to display the distribution of scores (histogram, polygon, or bar graph) and why you picked that graph (for each).
a) number of pizzas consumed during the previous week
b) size of T-shirt worn (S, M, L, XL)
c) gender (male, female)
d) grade point average for the previous semester
e) college class (freshman, sophomore, junior, senior)