Weights implement the weight data abstraction by completing the weight constructor and the size selector so that a weight is represented using a two-element list where the first element is the string 'weight'. the total_weight example is provided to demonstrate use of the mobile, side, and weight abstractions.

True i belive sorry if i am wrong

Solution: the categorization of functional and non-functional requirement are as follows: some of the more typical functional requirements include: • business rules• transaction corrections, adjustments and cancellations• administrative functions• authentication• authorization levels• audit tracking• external interfaces• certification requirements• reporting requirements• historical data• legal or regulatory requirementswhile,some typical non-functional requirements are: • performance – for example response time, throughput, utilization, static volumetric• scalability• capacity• availability• reliability• recoverability• maintainability• serviceability• security• regulatory• manageability• environmental• data integrity• usability• interoperability