A positive charge q is fixed at point (3,-4) and a negative charge -q is fixed at point (3,0). Determine the net electric force Fnet acting on a positive test charge +Q at the origin (0,0) in terms of the given quantities and physical constants, including the permittivity of free space co. Express the force using ij unit vector notation. Enter precise fractions rather than entering their approximate numerical values. 3- 12 די = -2- -3-