Shewhart Control chart

Using the following data and Minitab, your group has to draw a Shewhart Control chart. Post the group graph and explain or analysis the results. 
Data:
Period: 1 , 2, 3 ,4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16
Response Time (Hours): 4, 5, 6 , 7, 3, 4, 2, 5, 6, 7, 12, 9, 10, 11, 12, 12