The goal of this project is to simulate the trajectories of the Earth and the Moon during one year. You are given the initial positions and velocities and masses. Because the mass of the Sun is so much bigger than those of Earth and Moon, we can consider the Sun fixed at the origin of our coordinate system and you only have to calculate the trajectories of Earth and Moon. The problem is broken down into four smaller zyLabs. Most of the background and theory is written down in this zyLab, though, and you can come back to this problem when you are working on later zyLabs. However, in this zyLab you will only have to calculate forces. You will then use your force calculations in subsequent zyLabs (copy