A two point charges 4 q and -q are fixed on the x -axis at x=-d/2 and x=d/2, respectively. If a third point charge 'q' is taken from the origin to x=…

A two point charges $\displaystyle 4 q$ and $\displaystyle -q$ are fixed on the $\displaystyle x$-axis at $\displaystyle x=-\frac{\mathrm{d}}{2}$ and $\displaystyle x=\frac{\mathrm{d}}{2}$, respectively. If a third point charge 'q' is taken from the origin to $\displaystyle x=\mathrm{d}$ along the semicircle as shown in the figure, the energy of the charge will :