Pre-requisites:
- Python 2.7
- Spark 2.0

Structure:
1. The solution is coded in pyspark and spark 2.0. I am mostly using spark SQL
and spark dataframes.

2. There is one file for each question and every file will run independent of
each other eg: q1.py is for Question 1.

3. To run a python file
 - Set $SPARK_HOME to to root of