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Use customers.xlsx and sales.xlsx to answer the following questions: 1. Join the customer and sales data. 2. Remove rows with missing values. 3. How many
Use customers.xlsx and sales.xlsx to answer the following questions: 1. Join the customer and sales data. 2. Remove rows with missing values. 3. How many countries do the customers span ? 4. Arrange the rows in the increasing order of date of sale. 5. Create a dataframe with the average sales from each country along with the country names.
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