choose the right answer for these 4 question

1) Which of the following statements is not true?

a. Requirements defects contribute significantly to project rework.

b. The requirements phase can be a significant source of defects.

c. Project cost and schedule can be reduced by minimizing time spent in the requirements phase.

2) Which of the following work products would typically identify project stakeholders?

a. Vision document

b. Supplementary specification

c. All of the above

3) Two categories of defects account for 80 percent of all requirements defects. Which of the following are the least common types of requirements defects?

a. Ambiguity

b. Incompleteness

c. Incorrectness

4) Which of the following would be considered to be requirements engineering activities? (select all that apply)

a. Allocating requirements to software

b. Documenting requirements

c. Managing requirements changes