11. The table summarizes the relationship between two categorical variables, grade year and the student's answer to the question, "Do you eat regularly in the school cafeteria?" Grade | 9% | 10 | 11h | 12 ) Total Eat in Yes | 130 175_ 122__ 68 495 cafeteria? No | 18 | 34 | 88 | 170 | 310 Total | 148 | 209 | (a) If you choose a student at random, what is the probability he or she eats regularly in the cafeteria? (b) If you choose a student at random, what is the probability he or she eats regularly in the cafeteria, given that he or she is in 10t grade? (c) If you choose a student at random, are the events "10t grade" and "eats regularly in the cafeteria" independent? Explain how you know