()2: Reset the simulation. This time we will focus on velocity. Turn the velocity and the ational force on and run the simulation. (a) Explain why the gravitational force and velocity vectors are perpendicular to each other. (b) Double the mass of the Sun and explain what happens to the magnitude of the velocity vector as the Earth rotates around the Sun using equations from Chapter 13. (c) Reset the mass of the star to our Sun and double the mass of the planet. How does this affect the magnitude of the velocity vector