Records kept by the chief dietitian at the university cafeteria over a 28-period show the following weekly consumption of milk (in gallons). Milk 200 205 210 215 220 225 230 235 240 Weeks 2 5 6 3 5 2 2 2 1 (a) Find the average number of gallons of milk consumed per week in the cafeteria. (Round your answer to the nearest whole number.)