A person's arm rotates around the shoulder (S) and elbow (E) joint axes. The arm has...

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A person's arm rotates around the shoulder (S) and elbow (E) joint axes. The arm has the length a = 9 1/2", the forearm has the length b = 11". The shoulder joint angle is 0 = 39.The elbow joint angle is y = 23. a) Compute the Cartesian coordinates of the endpoint H by using a+b. (2 pts.) b) Identify the origin of your reference frame. (1 pt.) E A person's arm rotates around the shoulder (S) and elbow (E) joint axes. The arm has the length a = 9 1/2", the forearm has the length b = 11". The shoulder joint angle is 0 = 39.The elbow joint angle is y = 23. a) Compute the Cartesian coordinates of the endpoint H by using a+b. (2 pts.) b) Identify the origin of your reference frame. (1 pt.) E