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Let A" "=" "{1," "2," "3," "4}," "B" "="...

Let `A" "=" "{1," "2," "3," "4}," "B" "=" "{1," "5," "9," "11 ," "15 ," "16}` and`f" "=" "{(1," "5)," "(2," "9)," "(3," "1)," "(4," "5)," "(2," "11)}` . Are the following true? (i) f is a relation from A to B (ii) f is a function from A to B. Justify y

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