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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.
 
minus, 9
6
minus, 7
Undefined
g, left parenthesis, minus, 5, point, 0001, right parenthesis
g, left parenthesis, minus, 5, right parenthesis
g, left parenthesis, minus, 4, point, 999, right parenthesis
g, left parenthesis, 9, right parenthesis
Stuck?
Stuck?