Question: Using the saledata variable, extract the fiscal quarter. You will need to add a new variable called quarter to the dataframe df . If month

Using the saledata variable, extract the fiscal quarter.
You will need to add a new variable called quarter to the dataframe df.
If month is jan, feb, mar; then the quarter is 1. If month is apr, may, jun; quarter is 2, etc.
Analyze sales trends over different quarters to determine if there are peak periods for car sales.
find the average of sellingprice grouped by quarter. Save this data to a variable named rice_by_quarter

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