Refer to the above diagram to answer this question. A skateboarder and his skateboard have a combined mass of 76.4 kg. The skateboarder passes a part P that is 3.90 m above bottom of the hill with a speed of 1.25 m/s. What is the skateboarder's kings energy as he passes another point Q that is 1.15 m above the bottom of the hill? Select one: O a. 2. 12 x 103 J O b. 2.89 x 103 J O C. 2.18 x 103 J O d. 2.98 x 103 J