Suppose there are two finned heat sinks with identical geometry. One is made of copper and one out of aluminum. Assume that copper has approximately twice the thermal conductivity of aluminum. The flat side of the heat sink is attached to a constant temperature source, which we can call the hot side. Assume the hot side is held at 100C. On the cold (finned) side air is being forced over the fins. Under what condition would the heat sinks transfer heat at closest to the same rate? a) 40C air is forced slowly over the fins. b) 40C air is forced quickly over the fins. c) 50C air is forced slowly over the fins. d) 50C air is forced quickly over the fins.