Which of these mappings is a function? A value 5 in x corresponds to 6 in y. A value 6 in x corresponds to 2 in y and 4 in y. A value 7 in x corresponds to 8 in y. A value 8 in x corresponds to 4 in y. W.A value 5 in x corresponds to 2 in y. A value 6 in x corresponds to 8 in y. A value 7 in x corresponds to 6 in y. A value 8 in x corresponds to 4 in y. X.A value 5 in X corresponds to 4 in Y. A value 6 in X corresponds to 2 and 6 in Y. A value 7 in X corresponds to 8 in Y. A value 8 in X corresponds to 6 in Y. Y.A value 5 in X corresponds to 8 in Y. A value 6 in X corresponds to 6 in Y. A value 7 in X corresponds to 2 and 8 in Y. A value 8 in X corresponds to 4 in Y. Z. A. W B. X C. Y D. Z