What can you say about the three charges that create the electric field shown below:

1. q1,q3 are negative; q2 is positive; the magnitude of q2 is twice as large as either q1 or q3
2. q1,q3 are positive; q2 is negative; the magnitude of q2 is twice as large as either q1 or q3
3. q1,q2 are positive; q3 is negative; the magnitude of q3 is twice as large as either q1 or q2
4. q1,q3 are positive; q2 is negative; the magnitudes of q1, q2 and q3 are equal.
5. not enough information