Preciso urgente de ajuda, se alguém puder me responder essas perguntas, ficaria agradecido Dou 25 pontos quem me ajudar rápido

Awater-filled u-tube manometer is used to measure the pressure inside a tank that contains air. the water level in the u-tube on the side that connects to the tank is 5 ft above the base of the tank. the water level in the other side of the u-tube (which is open to the atmosphere) is 2 ft above the base. determine the pressure within the tank.

What’s #16 asking me and how do i solve it?

Contains chemical energy. a. heat b. light c. natural gas