2017 THREE(c)

The graph below shows the function $y=f(x)$.

For the function above:
(i) Find the value(s) of $x$ that meet the following conditions:
(1) $f^{\prime }(x)=0$:
(2) $f(x)$ is continuous but not differentiable:
(3) $f(x)$ is not continuous:
(4) $f^{\prime \prime }(x)<0$:

(ii) What is the value of ${\lim }_{x\to -1}f(x)$?
State clearly if the value does not exist.