Protect the President Las Venturas

I dueled him on rustler, he has good flying skills
Update:
Test 1 = Stunt Performance: (Can you do 7 stunts in LV and 3 stunts in other cities?): COMPLETE
Test 2 = Killing Performance: (Can you kill the president in 8 minutes?): COMPLETE
Test 3 = Killing Performance: (Can you kill 2 PPLV members on foot?): Killed 1 member yet
Test 4 = Killing Performance: (Can you kill 2 PPLV members with a flying vehicle?): COMPLETE

We need another duel on foot test, please someone can take it?