KPU recently released the student's salary who graduated in 2019 with a business degree. The average annual salary for the student is $57690 per year. Use this figure as the population mean and assume the population standard deviation is $2000. a) What are the z-score that a sample will be between $56690 and $58690 of the population mean? b) What are the z-score that a sample will be between $55690 and $59690 of the population mean? c) What is the probability that a

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