In order to conduct a successful evaluation what must be accomplished?
a. observe the exercise and collect supporting data.
b. compare performance against expected outcomes.
c. determine needed changes to ensure outcomes.
d. all of the above.

In order to conduct a successful evaluation d. all of the above must be accomplished.    

If it's a smaller child or infant, place one on the middle of the chest and on the child's back. (if it is a bigger child with enough room for two, place one on the upper right/your left of the chest, and one on the lower left/your right) the pads should never touch each other.