Which muscle is identified as letter b in the graphic?

Which muscle is identified as letter c in the graphic?

Which muscle is identified as letter d in the graphic?

Which set of abdominal muscles are the deepest? 

These abdominal muscles are located on the anterior side of the abdominal wall, and are commonly refereed to as the "six pack."

This muscle is a large fan shaped muscle that covers the front of the chest. 

This is one of the major muscles of the back and is responsible for moving, rotating, and stabilizing the scapula. 

This is a rounded triangular muscle located at the uppermost part of the arm. It is connected to the clavicle, scapula, and humerus. 

This is the broadest muscle in the back. Its primary function is adduction of the arms. However, it also works in extension and rotation of the arms.

This muscle(s) is the primary extender for the elbow. It is located on the posterior side of the upper arm.