Bob has two tubes that both support (or hold) standing sound waves with the same frequency. Tube A has two open ends, and Tube B has one open end and one closed end. The value of the fundamental frequency for both tubes is the same.

(a) How many wavelengths long is Tube A for the fundamental mode (or frequency)?

(b) How many (of the same) wavelengths long is Tube B for the fundamental mode (or frequency)?