$6\mathrm{.}8.$ We have two processes P$1$ and P$2$ with p$1=40,$ t$1=15,$ p$2=80,$ t$2=30.$ The deadline for each process requires that it complete its CPU burst by the start of its next period $($the same as in examples shown in lecture$).$ u If so$,$ give the schedule for the first few periods. $($Use the same format as your answer to the previous question.$)$ means process Pi is scheduled from time t$1$ to time t$2.$ For example, $[0,2]$ P$1,[2,5]$ P$2,[5,6]$ P$3$ means P$1$ is scheduled from time $0$ to $2,$ P$2$ is scheduled from time $2$ to $5,$ and P$3$ is scheduled for time $5$ to $6.)$