Using Turtle graphics, implement function planets(), which will simulate the planetary motion of Mercury, Venus, Earth, and Mars during one rotation of planet Mars. You can assume that:
(a) At the beginning of the simulation, all planets are lined up (say along the negative y-axis).
(b) The distances of Mercury, Venus, Earth, and Mars from the Sun (the center of rotation) are 58, 108, 150, and 228 pixels.
(c) For every 1 degree circular motion of Mars, Earth, Venus, and Mercury will move 2, 3, and 7.5 degrees, respectively. The figure below shows the state of the simulation when Earth is about a quarter of the way around the Sun. Note that Mercury has almost completed its first rotation.
