A cola-dispensing machine is set to dispense 10 ounces of cola per cup

A cola-dispensing machine is set to dispense 10 ounces of cola per cup, with a standard deviation of 0.8 ounce. The manufacturer of the machine would like to set the control limit in such a way that, for samples of 42, 5% of the sample means will be greater than the upper control limit, and 5% of the sample means will be less than the lower control limit.
a.At what value should the control limit be set? (Round z values to two decimal places. Round your answers to 2 decimal places.) Value should be in between and
b. If the population mean shifts to 9.8, what is the probability that the change will be detected? (Round your intermediate calculations to 2 decimal places and final answer to 4 decimal places.) Probability
c. If the population mean shifts to 10.4, what is the probability that the change will be detected? (Round your intermediate calculations to 2 decimal places and final answer to 4 decimal places.) Probability

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