7. Three electric charges are arranged on three of the corners of a square with side length 2.000 m. Charge 1 in the top left has a charge of +4.00 × 10−2 C, charge 2 in the top right has a charge of −3.00 × 10−2 C, and charge 3 in the bottom right has a charge of −1.00 × 10−2 C. What is the electric field and the electric potential in the bottom left corner of the square?