3. [5 marks] Consider f(x) = ln(24 - 2x + 3) which is defined for all r R. (a) Determine f'(x) and find the critical values of f(x). [Note: 24 - 2x +3> 0 for all R.] 1 (b) Determine the intervals on which (i) f(x) is increasing, and (ii) the intervals on which f(x) is decreasing. Be sure to show all necessary steps.