For each lever below, identify the class, the mechanical advantage $($MA$),$ and the missing

parameters: $Fr=fulcru{m}_{?}$ force, $x=$distance $($may indicate moment arm$),$ and E$=$Effort force.

Assume static equilibrium $(T=0$ and ${\displaystyle \underset{?}{\overset{?}{}}}F=0).$ Use standard conventions and show all your work.

$($Note: The distances and vector lengths are not drawn to scale$).$

Class $=$

$Fr=$

B$.$

$x=$

$MA=$

Type of advantage $=$