You are an architect designing a two-story building for mixed-use. according to the building code, the steps of stairs must be 4 to 7 inches in height, and they must have a depth of 10 inches. the height of one story (floor) is 10 feet. what is the horizontal space (width and depth of the floor) that you will need to build the stairs? if this space is not available what are other options that could be used to take people from one floor to the next?