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Evaluate step functions

Problem

A coordinate plane. The x- and y-axes both scale by one. The graph is of function y equals g of x which is a series of three horizontal line segments. The first segment starts with an open point at negative nine, negative nine and ends with a closed point at negative five, negative nine. The second segment starts with an open point at negative five, six and ends with a closed point at negative one, six. The last segment starts with an open point at negative one, negative seven and ends with a closed point at nine, negative seven.
Match each expression with its value.
9
6
7
Undefined
g(5.0001)
g(5)
g(4.999)
g(9)
Stuck?
Stuck?