Use the graph below to find exact values of the indicated derivatives, or state that they do not exist. If a derivative does not exist, enter dne in the answer blank. The graph of is black and has a sharp corner at . The graph of is blue.

graph of a piecewise linear function f, in black, and and linear function g, in blue.  f extends from (0,0) to (2,4) to (4,0).  g extends from (0,3) to (4,0).

Let . Find


(Enter dne for any derivative that does not exist.)