1.

What was the overall average expenditure of Company C in all the years together?

2.

What was the difference between the total expenditure of company B in the year 2006 and 2008 together and the total expenditure of company C in the year 2007 and 2009 together?

3.

What was the respective ratio between the expenditure of company A in the year 2009 and expenditure of company B in the year 2005?

4.

In which year was the total expenditure by all three Companies together second highest?

5.

Total expenditure of all three companies together in the year 2006 was what percentage of the total expenditure of company A overall the year together?