Please provide the answer and how to solve this problem:

Assume a stream of read$/$write references in a program is being executed in $3$ processors and that all the caches are empty. All the references are to the same location $($some variable X $)$ and the digit refers to the processor issuing the reference $($R for read, W for write$).$ For example, R$1$ means processor $1$ wants to read the line. The stream is: R$2,$ W$1,$ R$1,$ R$3,$ W$2.$ Using the MESI coherence protocol, mark the status of such location in every processor cache as M$,$ S$,$ E$,$ or I after each reference to X$.$