Dutch elm disease is spread by bark beetles that breed in the diseased wood.

A sample of 100 infected elms was obtained, and the number of bark beetles on each tree was counted. The data are summarized in the following table:

Boundaries Frequency 0 < x ≤ 50 8 50 < x ≤ 100 24 100 < x ≤ 150 33 150 < x ≤ 200 21 200 < x ≤ 400 14

(a) Graph a histogram for the bark beetle data.

(b) Graph a cumulative frequency polygon of the bark beetle data. Show the median and quartiles on your cumulative frequency polygon.