Sounds like "ee" as in "bee" but with the lips rounded like "u" as in "rune". Same as "u" in French "tu" or ü in German "über".
(i)e (y)e (ü)e (yu)e
Sounds like "e" as in "yes".
Sounds like "ar" as in "car". In some northern dialects of Chinese, the final of some syllables can change to become r-colored.