Which of the following examples would be classed as related parties ofJH Ltd due to the power they possess to directly influence the company?

1: JH Ltd's managing director

2: The son of JH Ltd's managing director, who is an intern in the company's office

3: The brother of JH Ltd's managing director, whose business supplies a large amount of production material for the company

4: JH Ltd's subsidiary company, AL Ltd

5: BR PLC, one of JH Ltd's regular customers