Software requirement engineering question

QUESTION #1: Answer the Following Questions: (5*3=15) a) Why is prioritization of requirements important? Explain the 100 Dollar test" prioritization technique. b) Describe at least three different scales/aspects/attributes on which prioritization can be done? (we are not asking for different prioritization methods) For each scale/aspect/attribute: why are they important and what could happen if they were not taken into account? c) Specification documents often fail to describe the requirements clearly for the various people who need to read them. Describe five different types of mistakes made by requirement engineers while writing the requirements. (Also provide examples)