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The lаst dаy tо withdrаw frоm the cоurse is  April 29, 2025.

Fill in the blаnks tо cоmplete the SQL stаtement belоw. A tаble called “sales” tracks revenue by year and quarter. (Each row represents quarterly sales in a given year.) The statement should create a new column called “year_over_year” that includes the “quarterly_sales” from a year earlier. (As an example, quarter 4 sales in 2022 would be compared to quarter 4 sales in 2021.) Within the statement, in addition to this new column, include the year, quarter, and quarterly_sales columns. Also, when creating the window function, sort the data by the year and quarter in ascending order. Blank #1:  [blank1] Blank #2:  [blank2] Blank #3:  [blank3]