Need your help for Questions

I have few doughts on the following questions it is based from simplelearn free test.

Q,1
80% of problem found in 20% of work - this concept found in the following.
1.Pareto
2.Endward Deming
3.Juran

Q.2

A senior stakeholder complains that much of the work required to satisfy the requirements suggested by him are not captured in the project document. Which of the following document can be used to determine what is and what is not part of the project work?
 
Options:
A. Work Breakdown Structure 
B. Scope Creep
C. Project Scope Statement 
D. Stakeholder Register

Q.3
A project manager in an Information Technology project is discussing a complex algorithm with a new team member. After a long and thorough verbal discussion the project manager asks the person if he understood the algorithm and can put it in the document. The team member implies that he has understood.  But when the project manager goes through the document, he realizes that the member didn’t understand what was actually said resulting in wastage of time and effort. . Who is responsible for this loss of time and how it could have been avoided?
 
Options:
A. Project manager, he shouldn’t have given the complex assignment to a new team member
B. Team Member, since he implied he understood the discussion and didn’t ask his doubts immediately
C. Project Manager, as he should have also helped the team member in preparing and reviewing the document 
D. Project manager, since it is his responsibility to ensure his message is clear and concise and confirm that team member truly understands the message

Q.r
You have recently joined a new construction company and you find that your employer violates the construction permit by the local city government. What should you do?
 
Options:
A. Inform the city authority of the violation
B. Talk to your employer to find out if they are aware of breaking the law
C. Complain the legal department of the company
D. Do nothing as you are new in the organization