Find the standard deviation and calculate the lower and upper control limits of the data below ...

Find the standard deviation and calculate the lower and upper control limits   of the data below. I also will need a control limit xbar graph done of it if   possible      Day1 Day2 Day3 Day4 Day5   Sample Means Range   Week1 35 30 20 19 16 24 19   Week2 30 28 26 19 16 23.8 14   Week3 20 15 10 8 7 24 13