Shown below are selected data from a recent annual report of Quality Service.

(Dollar amounts are in millions.)

Beginning of

the Year

End of

the Year

Total assets $6,000 $6,600

Total stockholders' equity $3,200 $3,700

Operating income $2,000

Net income $1,900

Compute for the year:

(a) Return on average total assets

(b) Return on average total equity