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Let S = {a,b,c} and T ={1,2,3}. Find F ^...

Let `S = {a,b,c} and T ={1,2,3}.` Find `F ^(-1)` of the following F from S to T, if exists.
(i) `F = {(a,3), (b,2), (c,1)}`
(ii) `F = {(a,2), (b,1), (c,1)}`

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The correct Answer is:
`(i) F ^(-1) = {3,a) , (2,b) ,(1,c) } ,(ii) F ^(-1) ` does not exist
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