might be or might not be

[navi]

Which are correct:

1-He might be in or he might be out.
2-He might be in and he might be out.

3-He might be good, or he might not be good.
4-He might be good, and he might not be good.

5-He might be good, or he might not be.
6-He might be good, and he might not be.
('good' being implied here)

[Mister Micawber]

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I would use only 1-3-5, Navi. You are offering options: A or B.
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