1. In class, we calculated the height of geosynchronous orbit. Use that result to calculate the gravitational potential difference between geosynchronous orbit and the earth's surface. Remember that since the distance is not small compared to the radius of the earth, using PE = mgAh will not get the correct answer. 2. Now calculate the minimum amount of energy needed to lift Syncom 3, the first geosyn- chronous satellite, with a mass of 36.0 kg, from the surface of the earth to geosynchronous orbit