To help plan the number of meals to be prepared in a college cafeteria, a survey was conducted, and the following data were obtained. 127 students ate breakfast. 183 students ate lunch. 272 students ate dinner. 60 students ate breakfast and lunch. 111 students ate breakfast and dinner. 90 students ate lunch and dinner. 53 students ate all three meals. How many students ate (a) At least one meal in the cafeteria?   students (b) Exactly one meal in the cafeteria?   students (c) Only dinner in the cafeteria?  students (d) Exactly two meals in the cafeteria?  students

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