What is the function of the oval window, cochlea, and three semicircular canals of the inner ear?

What is the function of the oval window, cochlea, and three semicircular canals of the inner ear?

1. The function of the oval window is to receive and transmit vibrations
2. The function of the cochlea is to receive and transmit sound vibrations to the auditory nerve
3. The function of the three semicircular canals is to determine body position and maintain balance