Please solve the following using JAVA

Q1: Identify and correct the errors in each of the following pieces of code. [Note: There may be more than one error in each piece of code.]

a)

int x = 1, total;

while (x <= 10) {

total += x;

++x;

}

b)

while (x <= 100)

total += x;

++x;

c)

// Exercise 4.16: Mystery.java

public class Mystery {

public static void main(String[] args) {

int x = 1;

int total = 0;

while (x <= 10) {

int y = x * x;

System.out.println(y);

total += y;

++x;

}

System.out.printf("Total is %d%n", total);

}

}

*********************************************