Answer:
Twice as small
Step-by-step explanation:
The equation that links ferquency and wavelengh is (as you can see in the image I added) : f=v/λ
Where f is the frequency, v is velocity and λ is the wavelength.
Considering this information if the value of f doubles the value of λ will be reduced by a half.
I hope you find this information useful and interesting! Good luck!