The graph of a function g consists of two line segments.
• For −4≤x≤0, the segment has slope 2 and passes through (−4,−3).
• For 0≤x≤4, the segment has slope −1 and passes through (0,5).
For which of the following values of x is g′(x) NOT defined?
a) x=−4
b) x=2
c) x=0
d) x=−2