There are two balls located in deep space as shown in the figure. The black ball has mass 36kg and the red ball has mass 11kg. The distance between the two balls is r=15cm. (a) Find the magnitude of the acceleration of the red ball. (b) If r is 3.5 times larger, with what factor will the acceleration a change? (c) If the mass of the black ball is 50 times larger, with what factor will the acceleration a change? (d) If the mass of the red ball is 50 times larger, with what factor will the acceleration a change?