20) A child applies a force parallel to the x-axis to a 10 Kg sled moving in a frozen surface of a small pond. As the child controls the speed of the sled, the x-component of the force she applies varies with the x-coordinate of the sled as shown in figure below. Calculate the work done by the force when the sled moves. (a) From x = 0 to x = 8 m. (b) From x = 8 to x = 12 m [3] [3] (c) From x = 0 to x = 12 m [2] F₁(N) 10 5 0 X(m) 8 12​