2015 TWO(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. $f(x)$ is not defined:

2. $f(x)$ is not differentiable:

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

(ii) What is the value of $f(-1)$?

State clearly if the value does not exist.

(iii) What is the value of ${\lim }_{x\to 2}f(x)$?

State clearly if the value does not exist.