A person X sets out to walk from A to B and at the same time another person Y starts to walk from B to A. After passing each other, X and Y complete their journeys in 3 hours 20 minutes and 4 hours 48 minutes respectively. If X walks at the speed of \(4\frac{1}{2}\) km/hour, what is the speed (in km/hour) of Y?

• A. \(3\frac{3}{4}\)
• B. \(3\frac{1}{2}\)
• C. \(4\frac{3}{4}\)
• D. \(4\frac{1}{2}\)