1. Y
2. B
3. W
If you guessed B, you're wrong. You might have been thinking of A. Just because B comes after A doesn't make it a vowel too.
If you guessed W, you're wrong. You might have been thinking of U. Unfortunately, two vowels do not make a vowel.
If you guessed Y, you're right! Just because Y isn't always a vowel doesn't mean that it's not a vowel at all. That's like someone saying that he doesn't like pizza if he doesn't like anchovies.
Y is often ignored as a vowel because it's overshadowed by the "pure" vowels. That's not fair. Y is a vowel too!
Another thing that gets ignored unfairly is indigo as a color of the rainbow. Haven't you heard of ROYGBIV? What do you think the I stands for? Look at the rainbow. There's two blues in there, blue and indigo.
Originally, it was considered that there was only 5 colors in the rainbow. Orange and indigo weren't included. Then Newton decided to split the rainbow into 7 colors. So if we consider orange a color of the rainbow, why do we ignore indigo?
And what about violet? People use it interchangeably with purple all the time. Violet is a pure wavelength of about 400 nanometers. Purple is a mixture of red and blue wavelengths used to close the gap in the color wheel. That's a big difference!
I don't know why, but I can't stand it when certain objects don't get the rights that they deserve. I guess that I'm the self appointed caretaker of rats and dust bunnies and vegetables and ignored vowels and colors. I am a strong supporter of equality for all inanimate objects. So remember, indigo is a color too.