Test Case #$2$:

R R R

$123$

P$1$ w n x $//$ P$1$ is x$-$holding R$3,$ waiting for R$1.$

P$2$ x w n $//$ P$2$ is x$-$holding R$1,$ waiting for R$2.$

P$3$ n x n $//$ P$3$ is x$-$holding R$2.$