Suppose that lim f x 9 and lim g x 3 Compute the limits that exist X 4 X 4 a lim f x 3g x X 4 b lim f x g x X 4 c lim 4f x g x d lim X 4 f x x 4f x g x a Select the correct choice below and if necessary fill in the answer box to complete your choice OA lim f x 3g x X 4 Type an integer or a simplified fraction OB The limit lim f x 3g x does not exist X 4