find and explain a syntax error in the following piece of code.

public class Week9Quiz { void calculateArea(int x, int y){ //Do something } int calculateArea(double x, int y){ //Do something } void calculateArea(double x, int y){ //Do something } }

b)Explain the output of the following class

public class Week9Quiz { int counter=10; public void Week9Quiz() { counter=20; } public static void main(String[] args) { Week9Quiz w9=new Week9Quiz(); System.out.println(w9.counter); } }