If a normal-shaped population with m 5 40 and s 5 5 is shown in a frequency distribution graph, how would the mean and standard deviation be represented?

a. The mean is represented by a vertical line drawn at X 5 40 and the standard deviation is represented by a vertical line drawn at X 5 45.

b. The mean is represented by an arrow under the graph pointing up X 5 40 and the standard deviation is represented by a vertical line drawn at X 5 45.

c. The mean is represented by a vertical line drawn at X 5 40 and the standard deviation is represented by a horizontal line drawn from X 5 40 to X 5 45.

d. The mean is represented by an arrow under the graph pointing up X 5 40 and the standard deviation is represented by a horizontal line drawn from X 5 40 to X 5 45.