
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
There are 11 members in total from two units, A and B, with unit A having 7 members and unit B having 4 members. A group of 5 people is to be formed from these members. 

1. How many ways can the group be formed if it must include 2 people from unit B?
2. How many ways can the group be formed if it must include at least 2 people from unit B?
3. How many ways can the group be formed if a specific person from unit B and a specific person from unit A cannot be in the group simultaneously?

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