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Among the class of 65 students, every student plays at least one of the given sports: tennis, football and badminton. To be precise, 31 of them play tennis, 23 of them play football, 31 of them play badminton, 19 of them play tennis and football, 17 of them play tennis and badminton, 16 of them play football and badminton, and 14 students play all the three sports. Find the number of students who play:
(i) Only tennis \(=\)
(ii) Only badminton \(=\)
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