plz post all the steps for each part:)

4. (20 points) Pressure The headspace of a 10 ft diameter cylindrical tank is pressurized with nitrogen at 5 psig (constant pressure). Liquid (SG-0.85) is stored in the tank, and the liquid level can be determined based on the pressure measured by a gauge at the bottom of the tank. Answer the following questions related to this tank: Draw a picture of the system. Label your picture, including variables and units. b. What is the absolute pressure at the top surface of the liquid? The pressure gauge at the bottom of the tank reads & psig. What is the liquid level in the tank (ft)? d. On a cold day, the specific gravity increases to 09. What is the new liquid level