Blank is something empty lol
Work done by force is given by formula

now here work done against friction is given so force of friction here is

It moved by three corridors with each measures

so total distance will be

now from above formula of work done we will say


so above is the work done to move three corridors
ok so im not that good when it comes to physics but i think its C)
The wavelength of the wave is given by the letter A. And the amplitude of the wave is given by the letter B.