A water trough is 12 feet long. The vertical ends are trapezoids that are 4 feet across the top, 1 foot deep, and 2 feet across the bottom. Water is flowing into the trough at a rate of 5 cubic feet per minute. Find the rate of change of the depth of the water when the depth of the water is 0.2 feet.

Cannot figure out the diagram for this one, it's a related rates problem. Really stuck here.