A study of the effect of television commercials on 12-year-old children measured their attention span, in seconds. The commercials were for clothes, food, and toys. Clothes Food Toys
35 42 56
32 39 42
34 39 53
35 55 60
28 47 63
31 42 53
17 34 48
31 43 58
20 57 47
47 51
44 51
54

Complete the ANOVA table. Use 0.05 significance level. (Round the SS and MS values to 1 decimal place and F value to 2 decimal places. Leave no cells blank — be certain to enter "0" wherever required. Round the df values to nearest whole number.)

How do I figure out the ANOVA table?