Need help solving this problem for my timed final exam. Please help . due in 1 hour by 12:52am pst />

The average salary for a certain profession is ​$75,500. Assume that the standard deviation of such salaries is ​26,000. Consider a random sample of 66people in this profession and let x represent the mean salary for the sample.
What is μx​?
What is σx​?
Find the​ z-score for the value x equals 68,000.
Find Upper Px>68,000.

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