d) Let the set A = {1,2,3,4} and let P(A) denote the power-set of A. Consider the following function: f4 : P(A) → P(A) given by f₁(B) = {1,2,3}n B. Decide whether this function is injective, surjective, a bijection. ● ● f4 is an injection: f4 is a surjection: Not Answered Not Answered f4 is a bijection: Not Answered

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A: Using rules of functions.

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A: According to Bartleby guidelines we can answer only first. Rest please repost

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