I will be very graceful If someone help me to answer to this exercise
Subject : Scheduling procedures/process
statement:
There are three cyclically working processes P1, P2 and P3. The processes meetwith the arrival time specified in the following table and only carry out one (full) CPU burst and then a (full) I/O burst.
enter image description here
The scheduling works according to the round-robin strategy with a time slice duration of 2 time nits. The first three time units are fromalready given to us. Draw in the according to the legend
the following Gantt chart, like P1, P2 and P3 processed below(process states).

Note: The process switching time can be neglected. There is only a CPU, the I/O operations of the processes can be executed in parallel.It is sufficient if you hatch the areas appropriately for running.
enter image description here

with th Round-Robin-Strategy complete th provided GANTT Diagram