Four resistors are connected together in the configuration shown in the figure below. A battery is connected to this set of resistors so that its positive terminal is connected by a wire to one of the lettered points, and the negative terminal is connected to another of the lettered points. Consider the following three cases. 1: Positive terminal connected to a; negative terminal to b 2: Positive terminal connected to a; negative terminal to c 3: Positive terminal connected to b; negative terminal to http://tinypic.com/r/2e4i4hj/5

(a) Rank these cases, from largest to smallest, based on their equivalent resistance.
(b) Rank these cases, from largest to smallest, based on the magnitude of the current through the 4-ohm resistor.

(c) Rank these cases, from largest to smallest, based on the magnitude of the potential difference across the 8-ohm resistor.