One of the industrial robots designed by a leading producer of servomechanisms has four major components. Components' reliabilities are .97, .96, .94, and .92, and all these components must function in order for the robot to operate effectively. Designers want to improve the reliability of this robot by adding a backup component. Due to space limitations, only one backup can be added, and the backup for any component in the robot will have the same reliability as the component for which it is the backup. Select the backup that achieves the highest reliability for the robot, then indicate below the reliability achieved (round the final answer).