(Solved): Determine the signs (positive, negative, or zero) of \( y=f(x) \) (shown in the graph) and \( \lef ...

Determine the signs (positive, negative, or zero) of \( y=f(x) \) (shown in the graph) and \( \left.f^{\prime} x\right) \) and \( f^{\prime \prime}(x) \) when \( x=4 \). The sign of \( f(4) \) is The sign of \( f^{\prime}(4) \) is The sign of \( f^{\prime \prime}(4) \) is