B$.$ Briefly answer the following questions: $(12$ pts$)$

What is the NIOSH maximum permissible limit $($in

Newtons, lbs$.,$ or kg$.)$ for compression force in the

lumbar $($low$-$back$)$ spine? $(1$ pts$)$

What is ${25}^{\text{'}\text{'}}{60}^{\text{'}\text{'}}H$ action limit $($in Newtons, lbs$.,$ or

$k_{}9"$ or compression force in the lumbar spine? $(1$

pts$)$

Why do these values differ? Briefly contrast what these

limits are for and how they are used. $(2$ pts$)$

List the two studies used to determine the

biomechanical compression force limits for the

lumbar spine. $(2$ pts$)$

According to the information from class, how should

you perform heavy lifting to prevent low$-$back

problems? List four points. $(6$ pts $)$