Answer the following questions.
(1) Taro continues walking first 3km at 4 km/h and afterwards at 3 km/h.
Find the distance he walks in 2 hours.
(2) 2 hours after Taro leaves, Jiro pursues Taro from the same point. Jiro moves first 4 km at 15 km/h and afterwards at 12 km/h by bicycle.
Find the time when Jiro catches up with Taro after Jiro’s leaving.