
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
In a four-round selection process, there is one question in each round. A participant who answers the question correctly can proceed to the next round; otherwise, they are eliminated. It is known that the probabilities for the participant to correctly answer the questions in the first, second, third, and fourth rounds are $\frac{4}{5}, \frac{3}{5}, \frac{2}{5}$, and $\frac{1}{5}$, respectively, and the outcomes of each round are independent.
(Ⅰ) Find the probability that the participant is eliminated in the fourth round;
(Ⅱ) Find the probability that the participant is eliminated by the third round at most.

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