Let $S = \{a, b, c\}$ and $T = \{1, 2, 3\}$. Find $F^{-1}$ of the following function $F$ from $S$ to $T$,if it exists: $F = \{(a, 3), (b, 2), (c, 1)\}$.
- A$F^{-1} = \{(3, a), (2, b), (1, c)\}$
- B$F^{-1} = \{(1, a), (2, b), (3, c)\}$
- C$F^{-1} = \{(a, 1), (b, 2), (c, 3)\}$
- D$F^{-1}$ does not exist.
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