submarine ride at an amusement park lasts for 12 minutes. During the first minute, the submarine remains on the surface of the water. In the second minute, it dives to a depth of 25 feet below the surface. It remains at that depth for 2 minutes and then takes a 2-minute dive to a depth of 50 feet below the surface. It stays at that depth for another 2 minutes and then takes 4 minutes to return to the surface, concluding the ride.

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