Find online the annual$10-$K report for Costco Wholesale Corporation$($COST$)$ for fiscal year $2021.$ Answer the following questions from the financial$$ statements:

a$.$ What were$$ Costco's revenues for fiscal year $2021?$ By what percentage did revenues grow from the prior$$ year?

b$.$ What was$$ Costco's operating income for the fiscal$$ year?

c$.$ What was$$ Costco's average tax rate for the$$ year?

d$.$ What were$$ Costco's diluted earnings per share in fiscal year $2021?$ What number of shares is this EPS based$$ on$?$