QUESTION 4 For each of the following situations, classify as a loss due to an external failure (E) or loss due to an internal failure (1). Loss of revenue due to loss of sales due to quality (E or 1) Scrapping work in production (E or I) Customer returns (E or 1) Repairs associated with customer complaints (E or I) Lack of flexibility in manufacturing (E or !) Warranty expenses (E or 1)