c) Let the set A = {-1,0,1} and consider the following function: f3: A × A→ A × A given by f(x, y) = (y7, x). Decide whether this function is injective, surjective, a bijection. f3 is an injection: Not Answered ● f3 is a surjection: Not Answered ● f3 is a bijection: Not Answered 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}\B. Decide whether this function is injective, surjective, a bijection. f4 is an injection: Not Answered ● ● f4 is a surjection: Not Answered f4 is a bijection: Not Answered

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