ข้อ4 หน้า107

4.1

average waiting time = (0+6+8+9)/4= 5.75

turnaround time = 15

4.2

average waiting time = (7+3+0+1)/4= 2.75

turnaround time = 15

 average waiting time = (0+9+4+5)/4= 4.5

turnaround time = 15

4.3