What happens to the wavelength of sound when the source of sound is at rest and the observer moving towards it ?

What happens to the wavelength of sound when the source of sound is at

1.	What happens to the wavelength of sound when the source of sound is at rest and the observer moving towards it ?
Answer» Solution :The wavelength of SOUND REMAINS the same. i.e.,` lambda_(0)=lambda =v//f_(0)`.