A rectangular block of copper has sides of length 5 cm, 17 cm, and 40 cm. If the block is connected to a 4.

A rectangular block of copper has sides of length 5 cm, 17 cm, and 40 cm. If the block is connected to a 4.0 V source across two of its opposite faces of the rectangular block, what are the currents that the block can carry?(a) the maximum current (b) the minimum current