Answer:
a

b

c

Explanation:
From the question we are told that 
    The frequency is  
    The  length of the vibrating string is  
    The  mass is  
Generally the wavelength is mathematically represented as 
            
=>        
=>         
Generally the wave speed is  
           
=>       
=>       
Generally the tension on the wire is mathematically represented as 
         
=>      
=>      
 
        
             
        
        
        
Answer:
Eletromagnetic radiation which is also known as visible light.
Explanation:
 
        
                    
             
        
        
        
Answer:
I would have to say B THe su would rise in the west and set in the east But this is just a guess