Can I know how to get the standard deviation??

Weight (g) of a filled beverage container are given in the following table. These measurements were taken every five units. The target value for the mean is Ho = 500. Reading Weight 1 503 2 495 3 492 4 515 5 525 a. Estimate the process standard deviation. b. Set up and apply a tabular CUSUM for this process using standard value of H to detect a shift in the mean to 501 g. Determine whether the process is in or out of control. Select 3 correct answer(s) The process standard deviation is 11 The process standard deviation is 9.75 The process standard deviation is 4.73 The value of H is 5 The value of H is 48.76 The value of H is 55