You have an irregularly shaped flat object. To find its center of mass you can do which of the following? Assume that the object has constant density.

a. Separate the object into several regularly shaped objects whose center of masses you know, and use the mathematical definition of the center of mass to find it.
b. Find a point where you can put a fulcrum to balance it.
c. Push the object in different directions and find the point of intersection of the lines of action of the forces that do not rotate the object.