Ultimately your goal is to calculate the elbow joint angle g…

Ultimately your goal is to calculate the elbow joint angle given the position vectors shown in the image below. The position of the elbow with respect to the wrist and the shoulder with respect to elbow are shown and given numerically. 1. What is the magnitude of PE/W ?   2. What is the magnitude of PS/E ?   3. What is the dot product of PS/E and PE/W ? 4. What is the elbow joint angle as a deviation from anatomical position (angle between the vectors if you put them tail to tail) (answer in degrees)?