1) The author describes their elder sister as their personal leader who helped care for their family from a young age due to their parents' busy schedules.
2) Their elder sister took on responsibilities like caring for the younger siblings, making important family decisions, and giving advice, showing leadership qualities like courage, supportiveness, and good decision making.
3) The author reflects that their elder sister taught them important life lessons and qualities of a good leader through her example of optimism, wisdom, and service to the family.