Use the graph of the greatest integer function $y=\lfloor x\rfloor,$ Figure 1.10 in Section $1.1,$ to help you find the limits.
\begin{equation}\quad \text { a. }\lim _{\theta \rightarrow 3^{+}} \frac{\lfloor\theta\rfloor}{\theta} \quad \text { b. } \lim _{\theta \rightarrow 3 ^{-}} \frac{\lfloor\theta\rfloor}{\theta}\end{equation}