PLEASE HELP: 11: How fast would you need to travel a) to escape the gravitational pull of the sun? b) As the sun begins to die, it wil become a red giant. This means that its mass will remain the same but its diameter will increase substantially. When the sun becomes a red giant will its escape speed be greater than, less than, or the same as, it is now?

12: How fast would the moon need to travel in order to escape the gravitational pull of the Earth, if Earth has a mass of 5.98 X 10^24 kg and the distance from Earth to the moon is 3.84 X10^8 m?