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Use the following information to answer the next two questions. A student wrote down a summary of some sixteenth and seventeenth century ideas about planetary motion. 1. The paths of the planets are ellipses with the centre of the Sun at one focus. 2. The force between the Sun and a planet varies inversely with the square of its distance from the Sun. 3. An imaginary line from the Sun to a planet sweeps out equal areas in equal time intervals. 4. The ratio of the squares of the periods of any two planets revolving around the Sun is equal to the ratio of the cubes of their average distance from the Sun. Which ideas form the basis of Kepler's laws about planetary motion? A. I and 2 only B. 2 and 4 only C. 1, 3, and 4 only D. 1, 2, 3, and 4 10. Which ideas form the basis of Newton's law of universal gravitation? A. 2 only B. 4 only C. 1 and 2only D. 2, 3, and 4 only