Answer:
B. A "while" loop inside of a "for" loop
Explanation:
To enter 5 grade values, a for loop can be used to specify the number of grade values to be entered by the user, in other to ensure the validity of the grade values entered by the user, the while loop will be used inside the for loop such that the inputted values will only be accepted when the user enters a valid grade.
Code structure :
For a in range(0, 5) :
 grade = input()
 while grade (enter condition)
This is just the code structure and this will work for the problem stated. 
 
        
             
        
        
        
Answer:
The best choice is 802.11a.
Explanation:
The most common option, that is widely used in home internet is 802.11b, however, this only supports a max speed of 11Mbps. 
802.11a supports up to 54Mbps and it has regulated frequencies that prevent interference from other devices, such as the wireless system that your client already has. This option is more expensive, and its signal has issues going through walls and rooms but still, it is the one that fits him the most. 
 
        
             
        
        
        
Answer: measures how quickly a system performs a process or transaction
Explanation:
Computer performance refers to how well a given computer system performs, which is estimated by its accuracy, efficiency and speed when completing a process or transaction. 
A computer performance evaluation will assess a system's resources and outputs to make sure that it´s performing in the best possible way.
Some parameters of performance are latency, speed, throughput, and bandwidth.
 
        
                    
             
        
        
        
Answer:
You need an email and a job and to be over 18 for business ones or a legal gaurdian if you have none then ur hecced uwu :333
 
        
                    
             
        
        
        
Explanation:
how much the project will cost