Please help with these few questions

Question 3 (2 points) The population mean and standard deviation for a process for which we have a substantial history are 120 and 1.77, respectively. For the variable control chart, a sample size of 16 will be used. What is the standard deviation of the sampling distribution? (Round to two decimal places) Your Answer: Your Answer Question 4 (2 points) The population mean and standard deviation for a process for which we have a substantial history are 120 and 2.73, respectively. For the variable control chart, a sample size of 16 will be used. What is the three-sigma upper control limit for the process? (Round to two decimal places) Your Answer: Your Answer Question 5 (2 points) The population mean and standard deviation for a process for which we have a substantial history are 120 and 3.14, respectively. For the variable control chart, a sample size of 16 will be used. What is the three-sigma lower control limit for the process? (Round to two decimal places)Question 17 (1 point) If u= 23 ounces, o= 0.4 ounces, and n = 16, the +3 control limits will be 21.8 to 24.2 ounces O 23 ounces O 22.70 to 23.30 ounces O 22.25 to 23.75 ounces O None of theseQuestion 22 (1 point) Consider a firm that decided to use a c-chart to help keep track of the number of telephone requests received daily for information on a given product. Over 30-day period, an average of 25 requests per day are received. What is the value of the centerline? Your Answer: Your Answer Question 23 (2 points) Consider a firm that decided to use a c-chart to help keep track of the number of telephone requests received daily for information on a given product. Over a 30-day period, an average of 71 requests per day are received. What is a three-sigma upper control limit for c-chart? Your Answer:Question 25 {1 point} Consider the output of a paper mill: the product appears at the end of a web and is rolled onto a spool called a reel. Everyr reel is examined for the number of blemishes, which are imperfections. Number of Blemishes What would be a a three-sigma lower control limit for c-chart? [Round off to two decimal places}