Spark SQL Exercise
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The object of this exercise is to use Spark to read and filter the owid-covid-data.csv file.

Use the SparkSQL example notebook to find examples of the required python code.

In a new python notebook write code to:
1. Create a spark SQL session object

2. Use the spark SQL session to create a spark Dataframe that contains the owid-covid-data contents

3. Filter the dataframe to just records for the UK

4. Convert the filtered spark dataframe to a pandas DataFrame

5. Save the pandas DataFrame to a csv file

6. Optionally - create a chart with the pandas DataFrame to illustrate covid cases changing over time