5 Engineers study different shapes for storage tanks for liquid important component of rocket fuel One engineer is testing both the spherical and cylindrical designs below Both shapes have the same radius x The height 2 of the cylinder is 2x The engineer wants to choose the tank that has the least ratio of surface area to volume Surface area 4x Volume 3x 2x Surface area 2 x 4x Volume 2x4 Part A Write a function f to represent the ratio of surface area to volume for the sphere Simplify Part B Write a function g to represent the ratio of surface area