The diagram below identifies the elements of service as provided by a soft drink vending machine.Each element has an estimate of its own reliability,independent of the others.What is the reliability of the "system"? 
Definitions:
Discrimination
Unfair or prejudicial treatment of individuals based on characteristics such as race, gender, age, or sexual orientation.
Norris-LaGuardia Act
A 1932 U.S. federal law that limited the power of federal courts to issue injunctions in non-violent labor disputes, thereby promoting fair labor practices.
Injunctions
Legal orders issued by a court to prevent an action or to force an action to be taken.
Collective Bargaining
The process of negotiation between employers and a group of employees aimed at agreements to regulate working salaries, working conditions, benefits, and other aspects of workers' compensation and rights.
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