Darrell “The Jew” Brand
This target is in the open so just get a sniper rifle, pop a headshot and your objective is complete. If you want, you can kill the remaining enemies so you can collect the cash behind the target.
Wayne Roussel
This is another easy target. Activate the objective then follow your marker. You should see a large water tower a few meters away from the target location. You can climb that tower and get a clean shot at the target. You can then clean up the remaining enemies to collect the cash there.