12 ft 4 ft 4 ft 4 ft
Inca designs a whole a golf course which is the area of the design and square feet
The total area of the Inca design for the golf course would be:
12 ft * 4 ft + 4 ft * 4 ft + 4 ft * 4 ft = 48 sq ft + 16 sq ft + 16 sq ft = 80 sq ft
Therefore, the total area of Inca's golf course design is 80 square feet.