3. A police car is waiting at a stoplight when an evil physicist drives past at 15 m/s. After the physicist gets 45m ahead, the police car starts to accelerate at 6.5m/s?. At the same time, the evil physicist notices that the police car starts moving so immediately accelerates at 3.0 m/s? . (a) When will the police car catch the evil physicist? [5 marks] (b) What displacement will the police car move by the time it catches up to the evil physicist? [3 marks]