Charge qi =+q is located at position (0, d). Charge 92 = -2q1 is located at position (d,0). Charge 93 = 7q1 is located at position (2d, 2d). Determine the net electric field Enet at the origin in terms of the given quantities and physical constants, including the permittivity of free space 0. Express the electric field using ij unit vector notation. Enter precise fractions and roots rather than entering their approximate numerical values. 9₁ Enet == 92 d 93 x