A system has three processes, $Pl,P2,$ and P $3,$ and four types of resources, $R1-R4.$ The total system

resources are:

$*RI-1$ unit

R$2-2$ units

$-$R$3-1$ unit

R$4-3$ units

I

The needs and state of each process are:

P$1$ holds $1$ R$2$ and requests $1$ R$1$

P$2$ holds $1$ R $1$ and $1$ R $2,$ and requests $1$ R $3$

P$3$ holds $1$ R $3$ and requests $1$ R $2$

Draw the resource allocation graph representing the current state of the system.