Peter, Paul and Simon have shares in a company. Their shares are valued respectively at 1200, 2600, 4200. The sum of shareholders' equity for this company is 20,000 and a mysterious heiress owns the rest of the shares.

1) What does Peter's share represent compared to Paul's?

2) What does Peter's share represent in comparison to the company's capital? Give the distribution of the shareholders' equity shares in percentage between the shareholders.

3) Peter buys shares from Paul and increases his share by 20%. By how much have Paul's shares decreased? What are their respective shares in the company?