What are the "die hard" movies rated and why?!

Question: example:
die hard 1 (rating) (why)
die hard 2 (rating) (why)
die hard 3 (rating) (why)
die hard 4 (rating) (why)

Answers: example:
die hard 1 (rating) (why)
die hard 2 (rating) (why)
die hard 3 (rating) (why)
die hard 4 (rating) (why)

I think they're all rated 'R' for violence....

All "R"

language
Violence

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