
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
In the Cartesian coordinate system $xOy$, the parameterized equation of line $l$ is 
$$
\begin{cases}
x= \frac {3}{5}t \\
y=1+ \frac {4}{5}t
\end{cases}
$$
(where $t$ is the parameter). By establishing a polar coordinate system with the origin $O$ as the pole and the non-negative half-axis of the $x$-axis as the polar axis, the polar equation of curve $C$ is $\rho=2\sin\theta$.
(I) Find the Cartesian coordinate equation of curve $C$;
(II) If point $P(x,y)$ is an internal common point of line $l$ and curve $C$, find the range of values for $x-y$.

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