If \( f(x)=|x|+|x-1|+|x-2| \), then (a) \( f(x) \) has minima at \( x=1 \) (b) \( f(x) \) has ma...

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If \( f(x)=|x|+|x-1|+|x-2| \), then
(a) \( f(x) \) has minima at \( x=1 \)
(b) \( f(x) \) has maxima at \( x=0 \)
(c) \( f(x) \) has neither maxima nor minima at \( x=3 \)
(d) \( f(x) \) has max. at \( x=1 \)
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