REWARDS - Respect
CJ finds no one is home and goes back outside, which is when you'll receive a call from Sweet. He seems to be pinned down at his girlfriend's home by the Seville gang and he needs your help. Quickly make your way to the marker on your radar while keeping an eye on Sweet's health. You'll find a few Seville gang members outside the apartment. Use the low walls and any other obstacles for cover while you take them out.
Once you're done, you'll get another call from Sweet and he says he'll meet you outside. You need to go and find a 4-door vehicle and park in the red marker (any four-door vehicle will do, although the taxi won't work). Once they get in the vehicle, you'll need to make your way back to Sweet's house while avoiding the Seville cars trying to take you out. Once you get back to Sweet's house, the mission is completed.