one of the industrial robots designed by a leading producer of servomechanisms has four major components. components reliabilities are

$0$

$.$

$9$

$8$

$,$

$0$

$.$

$9$

$5$

$,$

$0$

$.$

$9$

$4$

$,$

$0$

$.$

$9$

$0$

$.$

$$all of the components must function in order for the robot to operate effectively. compute the reliability of the robot.