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:
Perceptual Studies
The examination of how organisms interpret and understand their environments through sensory input.
Lex Talionis
A principle of retributive justice meaning "the law of retaliation", where the punishment corresponds directly to the offense, as in "an eye for an eye".
Theory of Punishment
A set of principles that aim to justify and guide the imposition of penalties on individuals who violate laws, focusing on deterrence, retribution, rehabilitation, and restoration.
Retribution
A principle of justice that prescribes punishment for an offense should be proportionate to the severity of the crime committed.
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