Let P(x) be given by "x is a prime number," where the domain of x is the set of all positive integers less than 30. Recall that a prime number is an integer that is only divisible by 1 and itself. The integer 1 is not defined to be prime. (a) Is P(x) a propositional function? Explain. (b) Find all x such that P(x) is false. Let Q(x,y) be given by "x² + y² ≤ 4" where x, y € Z. Find all ordered pairs (x, y) for which Q(x, y) is true.

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