A satellite describes a circular orbit at an altitude of 11,870 mi above the surface of th...

A satellite describes a circular orbit at an altitude of 11,870 mi above the surface of the earth. Determine (a) the increase in speed required at point A for the satellite to achieve the escape velocity and enter a parabolic orbit, (b) the decrease in speed required at point A for the satellite to enter an elliptic orbit of minimum altitude 3960 mi, (c) the eccentricity e of the elliptic orbit.