[a] The graph in the figure given below is made efline segments joined end to points the graph has corners. end. At which points at the interval [ 2,6] is i' not dened? Give reasons for your answeL [b] Choose the correct graph of the derivative of f below. [b] Graph the derivative off. g A. 6A! a In! 6' 6; El H x, G : _ G X b O C A! a x Q -6 H h m G