
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 an ellipse $C$: $\frac{x^{2}}{a^{2}}+ \frac{y^{2}}{b^{2}}=1 (a > b > 0)$ with an eccentricity of $\frac{3}{5}$ and a minor axis length of $8$,

(1) Find the standard equation of the ellipse $C$;

(2) Let $F_{1}$ and $F_{2}$ be the left and right foci of the ellipse $C$, respectively. A line $l$ passing through $F_{2}$ intersects the ellipse $C$ at two distinct points $M$ and $N$. If the circumference of the inscribed circle of $\triangle F_{1}MN$ is $π$, and $M(x_{1},y_{1})$, $N(x_{2},y_{2})$, find the value of $|y_{1}-y_{2}|$.

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