
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
Given a bag containing 6 ping-pong balls, of which 4 are yellow and 2 are white, a ball is randomly drawn from the bag each time. If a white ball is drawn, the drawing stops. There are 3 drawing opportunities in total. Let X denote the number of draws when the drawing stops.
(1) If the ball drawn each time is not returned, find E(X);
(2) If the ball drawn each time is returned, find D(X).

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