Exploratory well “A” was drilled into a sand and encountered only water at a depth of 6732 ft with specific gravity 1.02 at a pressure of 3412.84 psi and temperature of 225 F. a second exploratory well, “B” was drilled updip, and found only gas at a depth of 6423 ft with a specific gravity of 0.765 at a temperature of 234 F and pressure of 3356.83 psi. Under these conditions, the Z-factor was 0.84. Using these information, estimate the depth to the G/W contact.