Write a recursive Racket function "keep-short-rec" that takes an integer and a list of strings as parameters and evaluates to a list of strings. The resulting list should be all of the strings from the original list, maintaining their relative order, whose string length is less than the integer parameter. For example, (keep-short-rec 3 '("abc" "ab" "a")) should evaluate to '("ab" "a") because these are the only strings shorter than 3.

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