Question

A set of a vowels in English alphabet

Answer 1

Answer:

These letters are vowels in English: A, E, I, O, U, and sometimes Y. It is said that Y is "sometimes" a vowel, because the letter Y represents both vowel and consonant sounds. In the words cry, sky, fly, my and why, letter Y represents the vowel sound /aɪ/.

Answer 2

Answer:

Well, a subset is just a set that is composed entirely of members of some other set. For example, let's say we're talking about the set of all letters in the English alphabet—A, B, C, D, and so on through Z. One subset of this is the set of vowels—A, E, I, O, U