
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 the sequence ${a_n}$ is an arithmetic sequence with first term 1 and common difference 2, and the sequence ${b_n}$ satisfies the relation $$\frac {a_{1}}{b_{1}}+ \frac {a_{2}}{b_{2}}+ \frac {a_{3}}{b_{3}}+...+ \frac {a_{n}}{b_{n}}= \frac {1}{2^{n}},$$ find the value of $S_5$, the sum of the first 5 terms of the sequence ${b_n}$.

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