At ABC warehouse, a worker stands between a pallet and end of conveyor. The

top of the pallet is $15$ cm from the floor and the surface of the conveyor is $1$ m

from the floor. As a box moves to the end of the conveyor the worker twists $60$o

to pick up the box, then from that point twists $140$oin the opposite direction and sets

the box down on the pallet. Each box is $28$ cm on each side and weighs $15$ kg$.$

Assume he moves $3$ boxes per minute for an $8$ hour shift. Using the NIOSH lifting

equation, calculate RWL and LI$.$ Redesign the task to improve it$.$ What is now the

RWL and LI$?$ Assume significant control is required when placing the box on the

pallet.