A pizza company is having difficult with late deliveries. So management has kept track of when a late delivery was made as well as who the driver was in the chart below.

Time	Monday	Tuesday	Wednesday	Thursday	Friday
4 –6	AC	AAB	AABCCC	A	ABC
6 - 8	BCC	ABCC	ABCCC	BBCC	ABBBCCC
8 - 10	AC	BB	BBCCC	BCC	AABBCCC
10 - 12	BC	BBCC	ABBCCC	BC	BBC

For example, an AC in the 4 –6 slot on Monday means driver A and driver C each hadone late delivery during that period.

a) Determine the upper and lower control limits.

b) Draw the control chart.

c) Do the data indicate a process is in control? Why or why not?