Java

6. In the following Java code snippet, which variables are of primitive types, and which variables are of reference types? double pi 3.14 ArrayList cint> numList-new Array List cint0 int i 3 Integer Integer(i) String Hello, _World 7. In Java, declare a variable that references to a two-dimensional double array and allocate space for the array 8. In Java, write a statement to check if an integer is even and if it is even, print out the message in the following form, Number 6 is even. when the number is 6. Note that number 6 is just an example 9. Assume there is a class AirConditioner that supports the following behaviors: turning the air conditioner on and off. The following methods are provide this behavior: turnOn and turnOff. Both methods take no arguments and return no value. Assume there is a reference variable myAC to an object of this class, which has already been created. Using the reference variable, invoke a method to tell the air conditioner object to turn off 10. Explain the difference between software verification and software validation