The number of arrivals per minute at a bank located in the central business district of a large city was recorded over a period of 200 minutes, with the following results:

Arrivals Frequency

0 14

1 31

2 47

3 41

4 29

5 21

6 10

7 5

8 2

Compute the

a. Expected return for the corporate bond fund and for the common stock fund.

b. Standard deviation for the corporate bond fund and for the common stock fund.