please walk me through this before I take my final. I'm still lost on how to figure these out.

A box with an open top has a square base and four sides of equal height. The volume of the box is 1053 It. The height is 4 it greater than both the length and the width. If the surface area is 549 ft , what are the dimensions of the box? The width (and length) of the box is ft. The height of the box is ft