Hi, I really need help with the following two questions. 1.) A Styrofoam slab has a thickness of 3.8 cm and a density of 303 kg/m^3. When a 73.2 kg swimmer is resting on it, the slab floats in fresh water with its top at the same level as the water surface. What is the area of the slab? 2.) A horizontal pipe 18.0 cm in diameter has a smooth reduction to a pipe 9.00 cm in diameter. If the pressure of the water in the larger pipe is 9.00e4 Pa and the pressure in the smaller pipe is 6.00e4 Pa, at what rate does water flow through the pipes in kg/s?