Please Correct My Sentences

I got few sentences where I face a bit confusion. Please correct the following sentences :-

1a. We apologize for any inconvenience this may have caused you.
1b. We’re sorry for the inconvenience which may have caused you.

2a. We have sent you 2 different emails on Sep 9 at different time
2b. We have sent you 2 different emails on Sep 9 at different times

3a. In order to remove all confusion I’m taking to you.
3b. In order to remove all confusions I’m taking to you.

4a. Jack, Antonio, Shawn, Robert and I are very happy.
4b. Jack, Antonio, Shawn, Robert and me are very happy.

I’m not sure I understand what you want.

1a is ok
2. neither are good as far as I’m concerned
3. neither are good English and I’m not sure what it is meant to be.
4a is correct.

1a, as Thredder says, is fine.

  1. Neither read well. I would suggest, “We sent you two separate e-mails at different times of the day on September 9th.”

  2. I assume you meant ‘talking’ not ‘taking’. 3a would be okay. “In order to remove all confusion, I’m talking to you.”

4a is correct as Thredder says. ‘I’ is a subject pronoun. The way to check is to leave out the other names, then everything is clear:
I am very happy. (You wouldn’t even consider saying ‘Me am very happy,’ would you?)

Thanks Beeesneees you got it correctly.

It was a TYPO, I wanted to write talking in 3rd sentence

No I wouldn’t use Me. I always use I but I was just confirming as few people use me as well.

and Thredder thanks to you as well