What vowel makes the (oo) sound?

What vowel makes the (uu) sound?

What vowel makes the (o) sound?

What vowel makes the (you) sound?

What vowel makes the (yuu) sound?

What vowel makes the (ya) sound?

What vowel makes the (I) sound?

What vowel does the (a) sound?

What vowels make the (eu…) sound?