Converting 3 star rating to 5 star

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I have some data in which the ratings are from 1 to 5.

But another department who gave us data has given it in 1 to 3.

Is there a way to convert those 1 to 3 rating and spread it on 1 to 5? Or a mathematical way to do this?

Data loos something like this - they just have 1 - 5 (6 is N/A)

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