Question: Which of these statements below are correct Lambda Calculus and Turing Machines are computational models answering the question on what does computable mean. Predicates output

Which of these statements below are correct
Lambda Calculus and Turing Machines are computational models answering the question on what does computable mean.
Predicates output either true or false.
Every multi-tape Turing Machine has an equivalent single-tape Turing Machine.
In Nondeterministic Finite State Machines the next state is chosen at random, which is equivalent to all next states being chosen in parallel.

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