Suppose x, y, z E N and A C N. 1. Write down the converse of the following statement. If x € A then x + 1 ¢ A. 2. Write down the negation of the following statement. There is an element w E A such that x < w < y. 3. Write down the contrapositive of the following statement. If z? e A then either z e A or z is greater than both x and y.

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