A spherical submersible 1.82 m in radius, armed with multiple cameras, descends under water in a region of the Atlantic Ocean known for shipwrecks and finds its first shipwreck at a depth of 2.45 X 103 m. Seawater has density 1.025 X 10 kg/m, and the air pressure at the ocean's surface is 1.013 X 105 Pa. (a) What is the absolute pressure at the depth of the shipwreck? Pa (b) What is the buoyant force on the submersible at the depth of the shipwreck? (Give the magnitude.)