14 Copy a picture of a crane on the next page. Do not trace them. Make a freehand sketch. (2) 2 Look at the placed where the Mark each winch with the letter w. 3. Look at where the pulleys placed mark each pulley with the letter Which of have pulley systems with two or more pulleys please​

Dereck works for long hours on his computer.  he frequently experiences physical strain by the end of the day because he does not follow an important rule of ergonomics with respect to the use of keyboards.  which of the following actions of dereck could lead to physical strain? a.  placing the keyboard exactly in front of him while typingb.  keeping hands and wrists straight while typingc.  using wrist pads throughout the dayd.  pounding at the keys on the keyboard while typinge.  resting his hands on the keyboard when he is not typing