Can you tell me about how to solve the center of gravity

In general you want to find the point in the object where the moment (torque) due to the object's mass under the pull of gravity is equal to zero. Stated another way - if the object is composed of several different discrete sections, and if you can determine the CG of each section as a stand-alone entity, then you can use the following formula, where m_i and x_i are the mass of each discrete section and position of that section's CG, respectively:


CG = \frac {\sum m_i x_i} {\sum m_i}