a) Briefly introduce class field and instance field in Java. If we are modeling a class City, indicate if the fields area and minimum-area should be a "class field or an "instance field. b) Based on your student information, answer the following questions: i. Write one statement to declare an array of int variable and initialize it with digits of your student ID number. Name this variable with your surname. o E.g. use array elements 1,2,3,4,5,6,7,8 if your student ID is 12345678 ii. What is the last index number of the above array