Researchers conducted a study and made a claim that the average salary for all jobs in Virginia is less than $67,000. W

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Researchers conducted a study and made a claim that the average
salary for all jobs in Virginia is less than $67,000. We want
to test the claim using 𝜶=𝟎.𝟎𝟓, and assume that
your data is normally distributed and the population standard
deviation 𝝈 is not known.
a) Identify the null and alternative hypotheses (use
symbols or spell out symbols).
b) Identify if this test is a left tail, right
tail, or two-tailed test. Explain why.
c) Show the formula that you would use to find the Test
Statistic. (You don’t need to compute anything here, or substitute
any values in the formula, just provide the appropriate general
formula.)
d) What Excel formula would you use to find the p-value
in this scenario? You don't need to compute the p-value, just
provide the formula.