A few years from now, your manager will ask you to inves$$gate inspector complaints from the final

assembly pack$-$out line. These inspectors are rotated every $60$ minutes to a new task $($that does not

include li$$ing$),$ so they are mentally and physically fresh as they inspect your company$$s finished

packaged consumer electronics that are ready to be sent to wai$$ng customers. Only one person works

as an inspector at any given $$me$.$ Inspectors pick up each box held directly in front of the body, using

both hands $($H $=11$ inches$),$ from a low conveyor $($V$=21$ inches$)$ complete a quick visual inspec$$on and

gently place good product on the upper conveyor $($V$=60$ inches$)$ with extended horizontal reach of $21$

inches. The assembly line runs at $4$ units $(4$ boxes$)$ per minute. For now, don$$t worry about what

happens to the bad product $($nearly all boxes are fine$).$ Workers don$$t want to damage the units which

are boxed for shipping at a total weight of $30$ pounds. The inspectors do not twist as they li$$ t