The graph given below shows the journey of a man who started from his home and returned at the end of the day. Study the graph carefully and answer the questions that follow.

`(i)` At what time did the man start from his home ?
`(ii)` How much distance did he cover in the first four hours of his journey ?
`(iii)` What was he doing from `3` p.m. to `5` p.m. ?
`(iv)` What was the total distance travelled by him during the day ?
`(v)` How much distance did he travel in the first `8` hours of his journey ?
`(vi)` By what time could he cover `16` km of his journey ?
`(vii)` At what time did he return home ?
`(viii)` Calculate the average speed of the man from `(a)` A to B and `(b)` B to C .