In time t$=0$ there are three processes, when it is known that:

Process $1,$ Priority $1,50\%$ busy in writing to a printer.

Process $2,$ Priority $2,25\%$ busy in writing to disk C$.$

Process $3,$ Priority $3,25\%$ busy in reading from disk D$.$

Process $1$ is ending after $5$ CPU seconds.

Process $2$ is ending after $12$ CPU seconds.

Process $3$ is ending after $13$ CPU seconds.

In addition, when there are three processes the OS is scheduling the processes via priority queue $($highest priority is selected, i$.$e$.,1$ is better than$3),$but when there are two processes the OS is scheduling the processes via random selection $($i$.$e$.,$ selects randomly a process$)$

Please provide a table of CPU usage probabilities between the processes.

Process $\backslash$ Time Provide here the different timelines and probabilities $......$

P$1$

P$2$

P$3$