Can someone explain abs show work for both part a and b please

Often called simply "velocity," this is the velocity of an object at a particular moment in time.

Does the distance travelled by an oscillating mass between times t=0 and t2 equal the displacement of the particle over the same time period if t2> t/2? hint: consider a sine wave starting at t1=0, then consider a closing wave starting at t1=0, for your explanation.

How much work would it take to move a coulomb charge across a 4 volt potential difference?