Callisto and Io are two of Jupiter's satellites. The distance from Callisto to the center of Jupiter is approximately 5 times farther than that from Io to the center of Jupiter. (a) Do the satellites move with acceleration? Write down the second law of Newton for their motion. (b) Using (a) write down the expression for the period of rotation (orbital period), T, as a function of radial distance r. How does Callisto's orbital period, TsubC, compare to that if Io, TsubI?