A rival engineer deploys a spherical sensor package into the Pacific Ocean. After a bit of study, you realize you may be able to determine the contents of the package based on its mean density. You assess the spherical package to have a diameter of 50 cm and to be traveling at a terminal velocity of 5 through saltwater. a) Calculate the Reynolds number of the object at terminal velocity, and estimate a drag coefficient. b) Construct a force balance under equilibrium conditions. Hint, be sure to include buoyancy and drag forces. c) What is the mean density of the sensor package?