Four point charges are fixed at the corners of a square centered on the origin in the xy-plane: a charge of \(+2Q\) at the top-left corner, \(+Q\) at the top-right corner, \(-2Q\) at the bottom-right corner, and \(-Q\) at the bottom-left corner. A movable test charge of \(-q\) is placed at the center of the square. Which of the following vector diagrams best represents the individual electrostatic forces exerted on the central charge and the resulting net force \(\vec{F}_{\text{net}}\)?