
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 service hotline has the following probabilities of being answered: 0.1 on the first ring, 0.2 on the second ring, 0.3 on the third ring, and 0.35 on the fourth ring.

1. What is the probability that a call will be answered before the fifth ring?
2. What is the probability that a call will not be answered after four rings?

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