
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
The "Fibonacci sequence" is a famous sequence in mathematics. In the Fibonacci sequence ${{a_{n}}}$, ${{a_{1}}=1}$, ${{a_{2}}=1}$, ..., ${{a_{n+2}}={{a}_{n+1}}+{{a}_{n}}(n\in {{N}^{*}}})$, find ${{a_{7}}}$; if ${{a_{2018}}=k}$, find the sum of the first $2016$ terms of the sequence.

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