(a) Communication satellites are placed into geosynchronous orbits; that is, they typically orbit in earth's equatorial plane, with a period of 24 hours. What is the radius of this orbit, and what is the altitude of the satellite above Earth's surface?

(b) A satellite is to be placed in a synchronous orbit around the planet Jupiter to study the famous "red spot". What is the altitude of this orbit above the "surface" of Jupiter? (The rotation period of Jupiter is 9.9 hours, its mass is about 320 earth masses, and its radius is about 11 times that of earth.)