Satellites can be put into elliptical orbits if they need only sometimes to be in high- or low-earth orbit, thus avoiding the need for propulsion and navigation in low-earth orbit and the expense of launching into high-earth orbit. Suppose a satellite is in an elliptical orbit, with a=4420 and b=4416, and with the center of the Earth being at one of the foci of the ellipse. Assuming the Earth has a radius of about 3960 miles, find the lowest and highest altitudes of the satellite above the Earth?
A. The minimum altitude is 272 miles above the Earth.
B. The minimum altitude is 292 miles above the Earth.
C. The maximum altitude is 548 miles above the Earth.
D. The maximum altitude is 648 miles above the Earth.