A process that is considered to be in control measures an ingredient in ounces. Below are the last 10 samples (each of size n = 5) taken. The population process standard deviation is 1.36. Samples 1 2 3 4 5 6 7 8 9 10 9 13 13 11 11 10 9 13 7 9 8 11 9 11 10 10 12 11 7 12 9 12 9 12 10 7 11 7 13 10 10 14 11 10 10 13 9 9 12 7 13 12 10 10 9 9 10 8 10 13 a) Standard deviation of the sampling means = . 608 ounces (round your response to three decimal places). b) With z = 3, the control limits for the mean chart are: UCL Subscript x overbar = 12.124 ounces (round your response to three decimal places). LCL Subscript x overbar = 8.476 ounces (round your response to three decimal places). c) The control limits for the R-chart are: UCL Subscript Upper R = nothing ounces (round your response to three decimal places).