
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 $\{a_n\}$ whose sum of first $n$ terms is $S_n$ and $S_n=n^2$. Sequence $\{b_n\}$ is a geometric sequence with $b_1=1$ and $b_4=8$.
(Ⅰ) Find the general term formulas for sequences $\{a_n\}$ and $\{b_n\}$;
(Ⅱ) If sequence $\{c_n\}$ satisfies $c_n=a_{b_n}$, find the sum of the first $n$ terms of sequence $\{c_n\}$, denoted as $T_n$.

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