PLEASE URGENT HELP!!!!!!!

Gerald assembled a wooden gate, as shown below, where each of the six boards that make up the lower part of the gate are the same size and the top piece is a semi-circle shaped piece of wood.
If x = 6 inches, y = 2 inches, and z = 3 feet, what is the volume of wood used to make the gate, to the nearest cubic inch?

A. 2,746 in3

B. 1,234 in3

C. 4,628 in3

D. 3,610 in3

PLEASE URGENT HELP Gerald assembled a wooden gate as shown below where each of the six boards that make up the lower part of the gate are the same size and the class=