A man started his journey on his car from location a and came back. The graph given below shows his position at different times during the whole journey.
Study the above graph carefully and answer the questions given below:
(i) At what time did he start and end his journey?
(ii) What was the total duration of the journey?
(iii) Which journey, onward or return, was of longer duration?
(iv) For how many hours did he not move?
(v) At what time did he have the fastest speed?