Use the roster method to write each of the given sets. For some exercises you may need to consult a reference, such as the Internet or an encyclopedia. (Enter EMPTY for the empty set.) The set of natural numbers x that satisfy x + 4 = 1

we need to solve for x. Subtracting 4 from both sides of the equation, we get: x + 4 - 4 = 1 - 4 x = -3 Since the question asks for the set of natural numbers, which are positive integers, and -3 is not a natural number, the set of natural numbers (x) that satisfy this equation is EMPTY (Ø).