
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 a sequence $\{a_n\}$ with its partial sum denoted as $S_n$, for any $n\in\mathbb{N}^*$, the point $(a_n, S_n)$ lies on the graph of the function $f(x)=-\frac {1}{2}x+ \frac {1}{2}$.  
(I) Find the general term formula of the sequence $\{a_n\}$.  
(II) Let $b_n= \frac {3}{2}\log_{3}(1-2S_{n})+10$, calculate the maximum value of the partial sum $T_{n}$ of the sequence $\{b_n\}$.

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