Functional requirements <span>are used in input, processing, and output operations that can help create more efficient programs as the data can be processed many times without having to be input again.
</span>The functional requirements define function/s of a system or its component. It <span>describes what a software system should do.</span>
        
             
        
        
        
Answer:  They are forms of of carrying data from communication devices. The difference is the medium where the signal travels.
Explanation:
Hi, the difference between guided and unguided media is that in the guided media, the signal travels through a physical medium whereas, in unguided media, the signal travels through the air.  
 Guided and unguided media are types of transmission media.
The transmission media carries electromagnetic signals, that transmit data between communicating devices like computers.
 
        
             
        
        
        
Answer:
Producers
Explanation:
Producers manufacture and provide goods and services to consumers.
 
        
             
        
        
        
Answer:
to close an open application