Interpreting a Distance–Time Graph

Mr. Gopal drives from home to his wife’s office to fetch her. After arriving at the office, he waited for his wife. They then both went for dinner at a restaurant before going home. The distance-time graph shows his entire journey.

1. How far from his home to the restaurant?
2. Find the time
   1. Mr Gopal waited for his wife,
   2. they spent dining at the restaurant.
3. Find the gradient of each of the following line segments, stating clearly what each gradient represents.
   1. \(OA\)
   2. \(BC\)
   3. \(DE\)