96 cubic feet
Explanation:
Divide figure into 2 rectangular prism, one on top and one at the bottom.
Volume of top prism (length x width x height):
3 • 4 • 2 = 24 cubic feet
Volume of bottom rectangular prism:
9 • 4 • 2 = 72 cubic feet
Add the volume of both figure together:
24 + 72 = 96 cubic feet
Hope this helps!
-SpaceMarsh