The CPU scheduling algorithm is FCFS: Three processes P$1-$ P$3$ arrive at time $0,1,$ and $6($ms$),$ with the lengths of the CPU bursts being $3$ms$,6$ms and $1$ms respectively.The CPU scheduling algorithm is FCFS: Three processes P$1-$ P$3$ arrive at time $0,1,$ and $6($ms$),$ with the lengths of the CPU bursts being $3$ms$,6$ms and $1$ms respectively.The CPU scheduling algorithm is FCFS: Three processes P$1-$ P$3$ arrive at time $0,1,$ and $6($ms$),$ with the lengths of the CPU bursts being $3$ms$,6$ms and $1$ms respectively.