Inauguration Ages. From the Information Please Almanac, we obtained the ages at the inauguration of the first 44 presidents of the United States (from George Washington to Barack H. Obama).

a. Identify the classes for grouping these data, using limit grouping with classes of equal width 5 and a first-class of 40-44.
b. Identify the class marks of the classes found in part (a).
c. Construct frequency and relative frequency distributions of the inauguration ages based on your classes obtained in part (a).
d. Draw a frequency histogram for the inauguration ages based on your grouping in part (a).
e. Classify the shape of the distribution of inauguration ages for the first 44 presidents of the United States both generally and specifically.