Please answer the question (reuploaded picture)

Answer:
Step-by-step explanation:
Wall area assuming no doors or windows
A = 12(14 + 14 + 8 + 8) = 528 ft²
As the desire is three coats of paint, the area to cover is
3(528) = 1584 ft²
at 150 ft²/gal
1584 / 150 = 10.56
so 11 gallons would be needed.