
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 university has a total of 8000 students, consisting of 1600 freshmen, 3200 sophomores, 2000 juniors, and 1200 seniors. To carry out a survey, it is decided to use the stratified sampling method to draw a sample of size 400.
(1) How many students are drawn from each grade?
(2) If there are 505 faculty and staff members and it is required to draw a sample of 50, what sampling method would you use, and please describe the specific sampling process.

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