How to solve this please

1.What are the units of the rate constant for: (i) a zero order reaction (ii) a first order reaction (iii) a second order reaction 2. What do you plot to get a straight line in each case? 3. Outline the conditions when your answer to question 2(iii) is not necessarily true. 4. Ihis is an exam style question......... What is the order of this reaction with respect to A ? Hint: Plot the appropriate graphs to find the order