is this correct english grammar?

[What's up]

1.he and she did it. or him and her did it.

2.it's i that did it, or it's me that did it.

 

[Jinx]

He and she did it.
It is I that did it.

 

[yu_buffon]

1.he and she did it.

2.it's me that did it.

 

[Jin]

1. He and she did it.

2.It's me that did it.

 

[LaLa]

Well it depends on what else the sentence consists of....