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of an accident due to the equipment failing and the worker at the time was not trained? 2.0 pts 3. A system has two subsystems A and B. The R(B) = 0.975. The system will fail if both A and B fail. What is F(A) if the probability of system failure is 0.0025? 1.5pts 4. A mixing tank will fail if the electrical switch (A) fails and the water pump (B) fails. If A has a