Hallie can use the equation p = 4l + 4w + 4h to determine the sum of the lengths of the edges of a rectangular prism. She begins to solve the equation for h but runs out of time. Her partial work is shown below: Which expression should follow the subtraction in Hallie’s equation? 1(l + w) 2(l – w) 3(l+w/4) 4(l-w/2)