CHECK YOUR PROGRESS the relations A, B, C defined below are functions from X to Y? Let X = (a, b, c) and Y = {1, 2, 3, 4}. Which of a. A = ((a, 1), (b, 2), (c, 3)} b. For all (x, y)e XxY, (x, y) e B means that x is a vowel and y is even.

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