Quiz:Degrees of irreducible representations

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1 Which of the following is not a possibility for the multiset of the degrees of irreducible representations of a finite group over a splitting field of characteristic zero (such as the complex numbers)?

1,1
1,1,2
1,1,1,3
1,1,1,1,4
None of the above, i.e., they are all possibilities

2 What is the largest possible value of the maximum degree of irreducible representation for a group of order 24 over a splitting field of characteristic zero (such as the complex numbers)?

2
3
4
6
8

3 What is the largest possible value of the maximum degree of irreducible representation for a group of order 2^{2n + 1} over a splitting field of characteristic zero (such as the field of complex numbers) where n is a positive integer?

2
2^n
2^{n + 1}
2^{2n - 1}
2^{2n}
2^{2n + 1}