Question $1(3$pt$)$: Objects $A,B,$ and $C$ have masses $m_A,m_B,$ and $m_C,$

respectively. The coefficient of kinetic friction between A and $B$ is

${}_k,$ and the friction between A and the ground is negligible and the

pulleys are massless and frictionless.

$($a$)$ Assuming $B$ slides on $A,$ draw the FBD and KD for each of the

three masses $A,B,$ and $C.$

$($b$)$ Find acceleration of $C$ as a function of $m_A,m_B,m_C$