Solve 3(ii) question immediately please


 3. Akshat was travelling in his car to a  meeting. He set off from home at 6 a.m. and stopped on the way for a break. This distance-time graph shows his journey. Read the graph and answer the questions given below: 

 

(ii) At what average speed was he travelling 
(a) over the first hour? 
(b) over the second hour? 
(c) for the last part of his journey? 
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