
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 region promotes "green travel" by operating a "shared bicycle" business. A high school interest group in this region consists of 9 sophomore students and 6 freshman students. They will use a stratified sampling method to select 5 people to form an experience group to go to the market and experience the use of "shared bicycles".

Question:
(1) How many sophomore and freshman students should be selected from this interest group?
(2) It is known that there are two models, X and Y, of "shared bicycles" in this region. During the market experience, all sophomore students in the experience group rented model X bicycles, and all freshman students rented model Y bicycles. If two people are randomly selected from the group, what is the probability that at least one of the two people rented model X bicycles during the market experience process?

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