2016 TWO(c)

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

For the function $y=f(x)$ above:

(i) Find the value(s) of $x$ that meet the following conditions:

1. $f$ is not continuous:

2. $f$ is not differentiable:

3. $f^{\prime }(x)=0$:

4. $f^{\prime \prime }(x)<0$:

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