The graph of y f a fox 3 x 4 is shown 4 3 2 1 54 125 Fo Ne esa 55 m 4 12 O a Select each value of a for which lim f x does not exist I a 2 0 1 2 b Select each value of a for which f is not continuous at a 2 0 1 2 3 O c Select each value of a for which f is not differentiable at a 2 0 1 2 3