Abox of tools weighing 20 lb is to be lifted (occasionally—maybe twice per day) from the floor to a cart that is 46 in. high. (no control is required at the destination.) the handle of the box is 10 in. high (i. e., the handle is located 10 in. from the floor). due to the width of the box, the worker must reach 24 in. in front of his or her ankles to grasp the handle, but does not need to twist.

(a) how would you rate the coupling type (good/fair/poor)? justify your answer.
(b) fill in a niosh lifting table and compute an rwl.
(c) what is the lifting index?
(d) how would the preceding analysis change if the lifting was done with one hand?