In gym class, the students are going to design and build obstacles for an upcoming field day. Before they can start building, each student has to submit a two-dimensional scale drawing of the obstacle they want to build. Barbara's drawing of her obstacle is shown below. Note: Figure not drawn to scale.

In Barbara's drawing, the obstacle has a total area of square feet.
This obstacle will have a width of 4 feet. The volume of the obstacle is cubic feet.