3. Explain what is meant by the statement $\lim_{x \to 1^{-}} f(x) = 3$ and $\lim_{x \to 1^{+}} f(x) = 4$.
[2 marks]
4. Given that $f(t) = \begin{cases} -2t + 1 \\ t^2 + 1 \end{cases}$, determine with calculations one possible value for t at which the function $f(t)$ will be continuous.
[3 marks]
5. The function $P(q) = \begin{cases} -5q - 1 \\ cq^2 + 1 \end{cases}$ is continuous at $q = -2$ where c is a constant, calculate one possible value for c.
[4 marks]