A rowboat with a mass of 94 kg carries a 61 kg rower and 24 kg of water that has accumulated in the bottom. It's drifting forward at 0.54 m/s when the rower scoops up 11 kg of water in a bucket of negligible mass and heaves it horizontally over the stern at a speed of 2.3 m/s relative to the boat. What is the subsequent speed of the boat? (Consider the speed of the water in the bucket given above to be measured with respect to the initial speed of the boat.)