Draw the resource allocation graph for the below and state whether there is deadlock in the system.

In a system, there are 3 processes - P1, P2 and P3, and 4 resources- R1, R2, R3 and R4. Consider the following scenario:

resource instances: One instance of resource type R1. Two instances of resource R2. One instance of resource R3. Three instances of resource R4.

process states: P1 is holding an instance of R2 and is waiting for an instance of R1. P2 is holding an instance of R1 and R2, and is waiting for an instance of R3. P3 is holding an instance of R3.