At the Outside Wall the Roof Is 9 Feet High

Multiple Choice

At the outside wall the roof is 9 feet high.The slope of the roof is 1.28 feet per foot.What is the height of the roof 4 horizontal feet from the outside wall toward the interior of the room? ​

A) 15.06 feet
B) 12.13 feet
C) 12.44 feet
D) 14.12 feet