James Bond has located his nemesis ' secret undersea research chamber . The chamber is spherical with an external diameter of 5.20 m. The mass of the chamber, when occupied , is 74400 kg. It is anchored to the sea bottom by a cable and the top of the chamber is 100 m below the sea surface. Take the density of sea water to be 1020kg / (m ^ 3) and note that the volume of a sphere is V = 4/3 * pi * r ^ 3

a) What is the value of the buoyant force on the chamger and the tension in the cable? b) If James Bond severs the cable holding the chamber to the sea floor, what acceleration would it experience?