Answer
The answer for b is 2. This is the brachioradialis muscle
Work Step by Step
The brachioradialis crosses the elbow joint and inserts in the radius. It helps to flex the elbow joint.
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.