You need to re-look at number
9. The car went 4 meters in 4 seconds, so the speed would be 1 meter/sec.
10. To get an average you have to take all 3 data entries and add them together then divide by 3 (the amount of entries). In this one, they were trying to be a little tricky by saying 2 hours at 40 km each. The total is 3 hours, so we'll divide by 3 to get km/hour. Let's do it!
80 + 40 + 40 = 160
160/3 = 53 1/3 km/hour