
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 geometric sequence $\{a_n\}$, $a_2=3$, $a_5=81$,  
(Ⅰ) Find the general term $a_n$ and the sum of the first $n$ terms $S_n$;  
(II) Let $b_n=1+\log_3{a_n}$, calculate the sum of the terms $\frac {1}{b_{n} b_{n+1}}$ up to $n=10$, denoted as $T_{10}$.

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