Two point charges are distance d = 43.5 cm apart, They have equal and opposite charge, each with magnitude Q = 8.94 oC. The negative charge is on the left, and the positive charge is on the right. An electron (mass 9.11 x 10-31 kg, charge 1.6x10-19 C) is placed half-way between the charges. What is the electrical field at this point? What is the force on this electron?