Problem 5 A person of mass my I SID kg is sitting on a seat of a stationary boat in front of his dog of mass ms. The boat has a symmetric shape and the mass of ms = 30 kg, and the seats are located symmetrically with respect to the boat's center of mass at distance of d = 3 m from each other. The person and the dog switch seats, and the boat moves by 0.4 m with respect to its initial position. Knowing that the dog is lighter than the person, nd the dog's mass ma. Assume zero drag