priority$($smaller the number, higher the priority$)$ are given below. If the CPU scheduling FCFS$,$ the average waiting time will be:

$\backslash$table$[[$Process$,\backslash$table$[[$Arrival time $($in$],[$ms$)]],\backslash$table$[[$CPU time needed$],[($in ms$)]],$Priority$],[$P$1,0,10,5],[$P$2,0,5,3],[$P$3,2,3,1],[$P$4,5,20,4],[$P$5,10,2,2]]$

$12\mathrm{.}8ms$

$8ms$

$6ms$

None of the above