college physics

A fisherman poles a boat as he searches for his next catch. He pushes parallel to the length of the light pole, exerting a force of 245 on the bottom of a shallow lake. The pole lies in the vertical plane containing the boat's keel. At one moment, the pole makes an angle of 34.5° with the vertical and the water exerts a horizontal drag force of 47.5 N on the boat, opposite to its forward velocity of magnitude 0.857 m/s. The mass of the boat including its cargo and the worker is 370 kg.
(a) The water exerts a buoyant force vertically upward on the boat. Find the magnitude of this force.
(b) Assume the forces are constant over a short interval of time. Find the velocity of the boat 0.435 s after the moment described. (Give the magnitude.)
(c) If the angle of the pole with respect to the vertical increased but the exerted force against the bottom remained the same, what would happen to the buoyant force and the acceleration of the boat?

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