Phil lives in Perth and his friend Werner lives in Sydney. The distance, by road, between their two houses is 4200 km (rounded to the nearest 100 km). Phil decides to drive to Sydney and Werner decides to drive to Perth. They leave home at the same time and travel the same route, but in opposite directions. Phil drives at a constant speed of 75 km/h and Werner drives at a constant speed of 105 km/h. a. Will they meet on the road at a spot closer to Sydney or closer to Perth?