y 10 8 6 4 3 2 1 -6 -5 -4 -3 -2 -1 O 2 3 5 6 X -1 -2 For the graph shown below, find all values of x for which f(x) is not differentiable. O X=2 O X = - 3, X = 0, x =2 O X = - 3, X =0 O f(x) is differentiable for all x-values