State with reason whether following functions have inverse: (ii) $g: \{ 5,6,7,8\} \to \{1,2,3,4\}$ with $g= \{(5,4),(6,3),(7,4),(8,2)\}$

related to an answer for: State with reason whether following functions have inverses: (i) $f: \{ 1,2,3,4,\} \to \{10\}$ with $f= \{(1,10),(2,10),(3,10), (4,10)\}$

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