Can someone tell me where I'm going wrong here? I'm uploading a jpeg of the circuit, I'm supposed to find the equivalent resistance between A and B. To me, it looks like R5 and R6 are in parallel and forming Rp56. From there I'm assuming that Rp56 would be in parallel with R3 and then that whole top part (R5, R6, and R3) would be in series with R4. Can someone point out where I'm making my error? I'm coming up with a total resistance of 5k and the answer should be 4k.