Translate please, i’d be able to help better:)
Answer:
Part a)

Part b)

Explanation:
As we know that torque is defined as the product of force and its perpendicular distance from reference point
so here we have

now we have


Part b)
Now we know the conversion as
1 meter = 3.28 foot
1 N = 0.225 Lb force
now we have



A surface wave is a wave in which particles of the medium undergo a circular motion.
A because it makes more sense