can anyone tell me?

[littlebaby]

hihi,

I'm confused with the following sentences..

1. He and I are going to the new coffee shop.
2. He and I am going to the new coffee shop.
3. I've forgotten who he or she is.
4. I've forgotten who he or she are.
5. I've forgotten who he and she is.
6. I've forgotten who he and she are.

which of the sentences above are correct? If no, is there any suggestions?

[matilda]

1
3
6

these are the correct sentences