
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
A family's telephone has the following probabilities of being answered: 0.1 for the first ring, 0.2 for the second ring, and 0.25 for both the third and fourth rings. Calculate the probability that the phone is answered before the fifth ring.

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