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

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Note: This is part 2 of a 2 part question, split as 2 separate questions here.