For the functions f(x) = √√x and g(x) = - x + 6 (a) (fog)(x) and its domain (b) (gof)(x) and its domain (a) (fog)(x) = (Do not rationalize the denominator.) Its domain is (Type your answer in interval notation.) (b) (gof)(x) = (Do not rationalize the denominator.) Its domain is find the following.