1) The position versus time for a certain object moving along the x axis is shown. The objects initial position is -3m.

The graph points since I cannot draw it start at
(0,-3),(2,9),(3,6),(4,4),(5,4),(6,0),(7,-4) and (9,0).

a) Find the average velocity in the time interval 0s to 2s in m/s.

b) Find the average velocity in the time interval 0s to 4s in m/s.

c) Find the average velocity in the time interval 2s to 4s in m/s.

d) Find the average velocity in the time interval 4s to 7s in m/s.

e) Find the average velocity in the time interval 0s to 9s in m/s.

2) A person takes a trip, driving with a constant speed 98.5 km/h except for a 15.1 min rest stop. If the person's average speed is 67.4 kn/h, how much time is spent on the trip in units of h.

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