Passing Org. Object to Rule?

Hi All,

Org Unit 1

*********HR Manager1

*********HR Manager2

*********Org. Unit 2

***************Manager2

********************Supervisor2

*********Org. Unit 3

***************Manager3

********************Supervisor3

This is my Organization structure. According to my scenario, i want to get approval from supervisor3 and manager3. After getting approval from manager3, the workitem should forwarded to supervisor2. Then as usual the approval process should continue to manager2 then both HR managers.

1. Can anyone help me to achieve this?

2. i think we have write custom rule? how can i achieve by using custom rule?

3. or is there any ways to achieve this scenario?

Thanks

Regards

SM Nizamudeen.