Two point charges are separated by 12. 0 cm and have charges of +5. 0 µC and −5. 0 µC, respectively. What is the electric field at a point midway between the two charges? (ke = 8. 99× 109 N·m²/C²)
a) 3. 7 × 10⁶ N/C
b) 2. 5 × 10⁷ N/C
c) 3. 1 × 10⁶ N/C
d) ​2. 1× 10⁸ N/C
e) zero