Exam Scores On a philosophy comprehensive exam, this distribution was obtained from 25 students.

Score	Frequency
40.5–45.5	3
45.5–50.5	8
50.5–55.5	10
55.5–60.5	3
60.5–65.5	1

a. Construct a percentile graph.

b. Find the values that correspond to the 22nd, 78th, and 99th percentiles.

c. Find the percentiles of the values 52, 43, and 64.