The emphasis may be on either the first or the last syllable. Both forms are correct, but the more common pronunciation has the emphasis on the last syllable.
The usual pronunciation of I (the pronoun or English letter) is the same as the word (eye). However, the pronoun I is sometimes "extended" as (aye), a long I with a very soft long E on the end,...
It depends on the person. Some say Ay-Tee-Ay-Tee because of other walkers, like the AT-ST, AT-PT and AT-AA. Others say At-At (@-@) because it's more efficient to use just two syllables rather than...
h-OW doo yoo doo make sure that you don't put too much time into stressing each word though. when spoken normally the "do you do" sounds almost like one word