1. What is the result of executing the following code? int[] sampleArray; sampleArray[0] = 21; sampleArray[1] = 22; sampleArray[2] = 23; for (int index = 0; index System.out.print(sampleArray[index]...

1. What is the result of executing the following code?

int[] sampleArray;

sampleArray[0] = 21;

sampleArray[1] = 22;

sampleArray[2] = 23;

for (int index = 0; index <>

System.out.print(sampleArray[index] + ", ");

2. Write a Java statement to declare an array of 25 BankAccount objects.

3. Define a static method to return the average of the floating-point numbers in a given array.