Qn3. 4 identical point charges of +3.0 uCare placed at the four corners of a square that is 40 cm on a side. Find the force on any of the charges due to the oth

Qn3. 4 identical point charges of +3.0 uCare placed at the four corners of a square that is 40 cm on a side. Find the force on any of the
charges due to the others?