15) Caesar just had to be busy, so he put two point charges of magnitudes + 5.00 uC, and + 7.00 uC along the x-axis at x = 0 cm and x = 100 cm, respectively. Then he did a calculation to figure out where a third charge had to be placed along the x-axis so that it does not experience any net force because of the other two charges. What did he get? A) 91.2 cm B) 4.58 cm C) 9.12 cm D) 50 cm E) 45.8 cm F) None of these