write all functions f: {1,2} -> {a,b,c,d} (in two line notation) how many functions are there how many are surjective how many are injective how many are bijective please help

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A: atoi : Accepts a string as an argument. The function converts the string to an integer and returns…

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A: SUMMARY: -   Hence, we discussed all the points.

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Q: What is the big-O for this function

A: