A worker who is a small parts handler for a metals manufacturer has suffered a lower back injury. He works an assembly line that requires that he lift parts weighing up to $40$ lbs$.$ from the floor to the conveyor belt, which is at a height of three feet from the floor. As a result of lower back surgery, his physician has released him to modified work with the following restrictions: $1)$ he must avoid repetitive bending and twisting; $2)$ he must stretch his back muscles every two hours; $3)$ given periodic urinary incontinence, he must have access to a restroom every two hours.

Formulate a program for the injured Workers$$ accommodations based upon these restrictions. Explain the purpose for each accommodation.