please help with this 3 loops

Analyze these Algorithms - Run each of the 3 loops below.

Note: Use the following to help time the following questions

 long startTime = System.nanoTime() ; 

 //call to method 

 long endTime = System.nanoTime() ; 

 long totalTime = endTime - startTime; 

 System.out.println(totalTime); 

Loop 1:

public static int run(int n) { 

 int sum = 0; 

 for (int i=0 ; i < n ; i++) 

 for (int j=0 ; j < n ; j++) 

 sum++; 

 return sum; 

} 

A) What is the Big-Oh running time?

B) Run the code with several values of N.

C) Create a table with at least 5 different values of N with the run time in milliseconds.

Loop 2:

public static int run(int n) { 

 int sum = 0; 

 for (int i=0 ; i < n ; i++) 

 for (int j=0 ; j < n * n ; j++) 

 sum++; 

 return sum; 

 } 

A) What is the Big-Oh running time?

B) Run the code with several values of N.

C) Create a table with at least 5 different values of N with the run time in milliseconds.

Loop 3:

Create your own loop! (write the code here)

A) What is the Big-Oh running time ?

B) Run the code with several values of N.

C) Create a table with at least 5 different values of N with the run time in milliseconds.