Final answer:
The gluteus maximus is in the buttocks, the biceps brachii in the upper arm, and the trapezius in the upper back.
Explanation:
The gluteus maximus is located in the buttocks and is the largest muscle in the human body. It extends from the hips to the femur.
The biceps brachii is situated in the upper arm and is responsible for flexing the elbow joint.
The trapezius muscle is located in the upper back and is involved in shoulder movement and stability.
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