$(3)$

Two rods are positioned on surfaces as shown. Given that end A has the indicated velocity, use the ICR method $($ICR means instaneous center of rotation$)$ to find

$($a$)V_{{?}_{?}}(B)$ and $V_{{?}_{?}}(C)($mag and direc$)$

$($b$){}_{AB}$ and ${}_{BC}($mag and sense$)$