Public class card { private student student; private string cardrecipient; private string cardmessage; public string tostring() { string returnstring; returnstring = "from: " + this. student + " \t recipient: " + this. cardrecipient + " \t message: " + this. cardmessage; return returnstring; } }

why is "student" colored in red in my code?

Continuous information you receive

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