[4 marks] Using the graphs below, determine any absolute extreme values of f(x) on the interval 1,4. Am i supposed to draw some on the graph. Give me exactly what to write down or draw to complete this question.[12 marks] Consider the graph of y=f(x).(a) Identify any critical values of f(x).(b) Identify any local maximum or minimum values and where they occur.(c) Identify any absolute maximum or minimum values and where they occur.(d) Determine the open intervals on which f is increasing or decreasing.