Find each of the following functions. f(x) = 5 − x, g(x) = x2 − 9 (a) f+g State the domain of the function. (Enter your answer using interval notation.) (b) f−g State the domain of the function. (Enter your answer using interval notation.) (c) fg State the domain of the function. (Enter your answer using interval notation.) (d) f/g State the domain of the function. (Enter your answer using interval notation.)