The graph of y=f(x)\displaystyle {y}={f{{\left({x}\right)}}} is shown.

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Based on the graph, answer the following.

f(x)=0\displaystyle {f{{\left({x}\right)}}}={0} when x=\displaystyle {x}= (Enter all solutions, separated by commas)

 

f(0)=\displaystyle {f{{\left({0}\right)}}}=