The communications satellite Telstar 1, launched in 1962, still revolves about the Earth in an orbit of semimajor axis a = 6002 miles and eccentricity e = 0.242. 

a) When Telstar is at perigee, closest to Earth, how far is it from Earth's center (in miles)? b) How far is it form the Earth's center when at apogee (in miles)? Assume an average radius of 3957 miles for the Earth. c) Now calculate this satellite's height above sea level when at perigee (in miles). d) Now calculate this satellite's height above sea level when at apogee (in miles)