Consider a closed tank that is partially filled with a fluid. The air pressure in the tank is 6 psi and the depth of the fluid is 10 ft. If the fluid is water (specific weight = 62.43 lb_{f}/ft^{3}), what is the pressure at the bottom of the tank in psi? Compare this to the pressure if the fluid is glycerin (specific weight = 78.6 lb_{f}/ft^{3}).