
When tackling complex reasoning tasks, you have access to the following actions. Use them as needed to progress through your thought process.

[ASSESS]

[ADVANCE]

[VERIFY]

[SIMPLIFY]

[SYNTHESIZE]

[PIVOT]

[OUTPUT]

You should strictly follow the format below:

[ACTION NAME]

# Your action step 1

# Your action step 2

# Your action step 3

...

Next action: [NEXT ACTION NAME]


system
Given the parametric equation of the curve $C$ as $ \begin{cases} x=6\cos θ \\ y=4\sin θ \end{cases} (θ \text{ is the parameter})$, in the same Cartesian coordinate system, the curve $C$ is transformed into the curve $C′$ by the coordinate transformation $ \begin{cases} x′= \frac {1}{3}x \\ y′= \frac {1}{4}y \end{cases}$.

1. Find the ordinary equation of the curve $C′$;
2. If point $A$ is on the curve $C′$, and point $D(1,3)$, find the trajectory equation of the midpoint $P$ of $AD$ as point $A$ moves on the curve $C′$.

Present the answer in LaTex format: \boxed{Your answer}
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