Here are the charges and coordinates of two point charges located in an xy plane: q1 = +3.00 × 10–6 C, x = +3.50 cm, y = +0.500 cm and q2 = –4.00 × 10–6 C, x = –2.00 cm, y = + 1.50 cm. How much work must be done to locate these charges at their given positions, starting from infinite separation?