3. (10 Points) A rectangular loop of wire with a length e, a width w, and resistance B. 82 R "straddles" (sits in) two adjacent regions of different electric field as shown in the drawing. The left half of the rectangle is in B1 and the right half is in B2, where B2 > B1. You can ignore gravity for this problem. a. Which requires more force: Pushing the rectangle to the left or pushing it to the right? Or do both pushes require the same force? Please explain in a couple of sentences. b. Which is harder: Pushing the rectangle upward or pushing it to the left? Please explain in a couple of sentences. c. In order to push the rectangle left with a constant speed v, what force must you apply? Give your answer in terms of e, w, R, B1, B2, v, and any constants you need