Final answer:
Air leaks most frequently occur at gaskets and fittings, which are designed to seal and connect various sections of a system respectively. Therefore, the correct answer to where air leaks can occur is both gaskets and fittings.
Step-by-step explanation:
The question at hand addresses a common issue in systems that involve the containment of gases within various components, such as cylinders, pipes, and reservoirs. When we look at where air leaks can occur, they most frequently happen at points where there are breaks in continuity or sealing challenges, which typically are at gaskets and fittings. Gaskets are designed to provide a tight seal between two surfaces, often under compression, to prevent the escape of air or other fluids. Fittings are used to connect different sections of tubing or piping and can also be points where leaks can develop due to improper installation, damage, or wear over time. Considering these facts, the correct answer to the question, 'Air leaks from which areas?' would be 3) Both Gaskets and Fittings.