Instructions

A questionis followed by data in the form of two statements labelled as I and II. You must decide whether the data given in the statements are
sufficient to answer the questions.

Question 15

How many elements are in the set $$B = \left\{n \epsilon Z: f(n) \leq 5\right\}$$
I. $$f:Z \rightarrow Z$$ is given by $$f(n) = \mid 2n - 1 \mid$$ for $$n \epsilon Z$$
II. $$f: Z \rightarrow Z$$ is into


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