
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 that $\{a\_n\}$ is an arithmetic sequence with first term $1$ and common difference $2$, and $S\_n$ represents the sum of the first $n$ terms of $\{a\_n\}$.
(I) Find $a\_n$ and $S\_n$;
(II) Suppose $\{b\_n\}$ is a geometric sequence with first term $2$ and common ratio $q$ satisfying $q^2 - (a\_4 + 1)q + S\_4 = 0$. Find the general term of $\{b\_n\}$ and its sum of the first $n$ terms, $T\_n$.

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