YEAR 9 PHYSICS 6 Anna and Bill walk the same route from home to school. They don't leave at the same time. Anna sets off first, followed by Bill 5 minutes later. The distance from their home to the school is 1.2 km. Anna walks at a steady speed of 1 m/s. Bill walks faster, at 1.5 m/s. (a) (1) How many seconds does it take Anna to complete the walk to school? [1] (il) Draw a distance-time graph for Anna's walk on the grid below [4] (i) How long does it take Bill to reach school? [1] (ii) Draw a distance-time graph for Bill's walk on the grid above. [2 (iii) Does Bill catch up with Anna? How can you tell this from the graph? [1] (iv) How long does it take Bill to catch up with Anna from the moment he sets out from home, and how far are they from school when he does? Does Bill reach school before Anna? If so, how long must he wait for Anna to arrive