In Discrete Structures class, there are students who are 19. 20 21. and 22 years old Due to a newly instituted dress code, the students may only wear red blue green or purple shirts to class What is the minimum number of students that must attend class in order to quarantee that there are at least 3 students who are the same age weanng the same color to class O 17 O 32 O None of hese O 18