+1.25 +0.25 0 0.20 0.40 0.50 0.80 1.00 TimeI : (h) Study the graph shown. The graph represents the position time graph of a person who is walking on a straight trail. Calculate the average velocity of the person in the 1.0 hour. Is the average speed of the person in 1.0 h the same value as average velocity or a different value? Explain your answer. A boy standing on a bridge drops a rock from the top of the bridge. If the top of the bridge is about 64.0 m high above the surface of water, how long does the rock take to hit the surface of water ? Ignore air resistance. Remember to identify all your data, write the equation, and show your work. (5 points)