(1 point) The image below shows the graph of the function z). Using what you know about the derivative function, answer the following [all intervals should be inside the bigger interval (7, 7}; do not include any points in your intervals outside of this set): a} When does f'(z} cross the waxis? _- b)Whenisf'(:I:} 26?: c) When is f'(:l:} S 9?' We now know that d dx (tan(x)) = cos2(x) For what values of x is the function tan(x) non-differentiable? (A) x= 0 (B) x = k for any integer k (C) x = ki for any integer k (D) X = 2 (2k+1)" for any integer k (E) Tangent is differentiable everywhere