Could you help me solve these question Problems 12.4 and 13.

Could you help me solve these question Problems 12.4 and 13.7from the attach book ‘SYSTEMS ENGINEERING PRINCIPLES AND PRACTICE’. ( please see the attach book) 12.4 A PDR is an important event during engineering design and the systems engineer has a key role during this review. Assume you (the systems engineer) have been given the assignment to be the principal presenter for an important PDR. Discuss what specific actions you would take to prepare for this meeting. How would you prepare for items that could be considered controversial? 13.7 Define the terms “ verification ” and “ validation. ” Describe the types of tests that are directed at each, and explain how they meet the definitions of these terms. Thanks