If you arent sure if its correct dont answer i will thumbs down they already answered incorrect last time.

A production manager at a Contour Manufacturing plant has inspected the number of defective plastic molds in five random samples of 30 observations each. Following are the number of defective molds found in each sample: Construct a 3-sigma control chart (z3) with this information. (If the lower control limit is negative, round the LCL to zero and other answers to 2 decimal places, e.g. 15.25.) Construct a 3-sigma control chart (z=3) with this information. (If the lower control limit is negative round the LCL, to zero and all other answers to 2 decimat ploces, e.g. 15.25.)