17 points Periodically the county Water Department tests the drinking water of homeowners for contaminants such as lead and co levels in water specimens collected in 1998 for a sample of 5 residents of a subdevelopement of the county is shown below lead g L 5 2 3 5 2 1 1 0 a Fill in the following chart to determine the sample mean and sample standard deviation S x Then X S 72 X 5 2 3 5 2 1 1 0 H n 1 H b Determine the critical value t 99 t 99 c Determine the maximal margin of error M