Six identical 10 microfarad capacitors are arranged in series forming a hexagon. They are labeled consecutively and a 10V battery is connected to nodes 1 and 3 (in other words, there are 2 resistors between the battery on one side of the hexagon, and 4 on the other side of the hexagon). What is the total capacitance (in microfarads) between nodes 1 and 3?