The fuel gage for a gasoline tank in a car reads proportional to the bottom gage pressure as shown in the image. Let the specific weight of water be 9790 N/m. If the full depth of the tank a = 33 cm and accidentally contains b= 3.7 cm of water plus gasoline, how many centimeters of air remain at the top when the gage erroneously reads "full"? Vent Air h? acm Gasoline SG = 0.68 Water 2 cm PO gage cm