Solve the following problem given below:
Problem: Three equal positive point charges of magnitude Q = 2.00μ C are located at three corners of a square of edge length d = 2.1 cm. A negative charge -6.00μ C is placed on the fourth corner.
Part A: At the position of the negative charge, what is the magnitude of the electric field due to the three positive charges?
Please include each step and the equations you used. Thanks!