Where can i find these Fallout 3 Quests?

Where can i find these quests?
1.The Nuka-Cola Challenge
2.Oasis
3.You Gotta Shoot 'Em in the Head
4.Reilly's RangersWhere can i find these Fallout 3 Quests?
Nuka cola challenge is in girdershadeOasis is at the top of the map north of the clifftop shacksReillys Rangers is in the dc area.its easy to get to from gnr radio.You gotta shoot em in the head is in ghoul underworld in the museum of history in dc.Where can i find these Fallout 3 Quests?
1.Girdershade. It's in the southwest, under a freeway.
2.In Oasis, which is in the upper-middle of the wastes. You'll have to find a narrow path leading into the large rock area.
3.The ghoul city of Underworld, in the Museum of History.
4.Not exactly sure about this one. In a certain part of the downtown D.C. area, you'll hear a message asking for help, which will begin the quest.
You can also start Reilly's Rangers by talking to the doctor in Underworld about Reilly's body. I think it needs a Speech check, though.
Here ya go. All the info you could possibly need. http://fallout.wikia.com/wiki/Fallout_3_quests