You may have 3 elevators, OR in these example start with 3 fliers standing next to one another in hands.  You may place a spot on each to support the flier's right foot.  Have the spotter place her left hand on the flier's ankle and her right hand under the flier's toe.  Now have the flier's connect arms and pull their stretches.  The far left flier will hold her own and the other stretches can either be placed up on the connected arms OR in this example held by the flier herself.