Decide if the given function is continuous at the specified value of x: 3. a. Vx - 2 f(x) = at x = 4 x-4 x +1 ifx=2 b. f(x) = 12 at x = 2 ifx > 2 x+1 ifxs3 c. f(x) = at x = 3 2x + 4 ifx > 3