Write the Word or Phrase That Best Completes Each Statement

Write the word or phrase that best completes each statement or answers the question.
The parametric equations of four curves are given. Graph each of them, indicating the orientation.
- $$\begin{array} { l } C _ { 1 } : x = 7 \sin t , y = 7 - 7 \cos ^ { 2 } t ; \frac { \pi } { 2 } \leq t \leq \frac { 3 \pi } { 2 } \\C _ { 2 } : x = \ln t , y = \ln t ^ { 2 } ; e ^ { - 4 } \leq t \leq e ^ { 3 } \\C _ { 3 } : x = t ^ { 2 } - 8 , y = t - 3 ; - 4 \leq t \leq 4 \\C _ { 4 } : x = t - 5 , y = t + 2 ; - 4 \leq t \leq 7\end{array}$$

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