The Last Place You Look

The Last Place You Look: Find all five missing car keys in Bloodshot Ramparts.
 * Key 1: As soon as you descend the stairs at the beginning of the area you should see a car hanging off of the edge to your left. The key is sticking out of the trunk.
 * Key 2: Immediately after the tollbooth you should see another car hanging off of the edge to your left. The key is sticking out of the trunk.
 * Key 3: Immediately to your right upon entering the covered area just past the tollbooth should be a school bus. The key is in the driver side door of the car on top of the bus.
 * Key 4: A little ways down the bridge, after you cross the tubes that form a small crossing, there's a car suspended over the middle of the platform. There is a key in it's trunk.
 * Key 5: After freeing Roland the 5th key is in the drivers door of a car at the bottom of the ramp to the sacrifice hole.