Suppose that lim f(x)=9 and lim g(x)=-3. Compute the limits that exist. X-4 X-4 f(x) a. lim [f(x)+3g(x)] b. lim [f(x)g(x)] c. lim [4f(x)g(x)] X-4 X-4 x-4 d. lim x-4 f(x)-g(x) a. Select the correct choice below and, if necessary, fill in the answer box to complete your choice. A. lim [f(x)+3g(x)] = 0 x-4 (Type an integer or a simplified fraction.) B. The limit lim [f(x)+ 3g(x)] does not exist. x-4 b. Select the correct choice below and, if necessary, fill in the answer box to complete your choice. OA. lim [f(x)g(x)] = x-4 (Type an integer or a simplified fraction.) OB. The limit lim [f(x)g(x)] does not exist. x-4