Using Matlab please help solving all steps, comments needed

Problem 14.11 Create an animation of the function y - sin(x-forranging from -2m to +2m a) for y = sin(x- a ranging from 0 to 8? Use a step size for x that results in a smooth graph. Let a be the animation variable. (Draw a new picture for each value of a.) Use a step size for a that creates a smooth animation. A smaller step size will make the animation seem to move more slowly