Gabi and Silvio are training for a cycling race. They live on the same street, but Silvio’s house is \(2\) km east of Gabi’s. On Sunday morning at \(7\) a.m. they each start biking east from their house. If Gabi bikes at a constant speed of \(24\) km/h and Silvio bikes at a constant speed of \(18\) km/h, at what time will Gabi catch up to Silvio?