Identify and correct the errors in each of the following pieces of code.

a) if (age >= 65);

System.out.println("Age is greater than or equal to 65");

else System.out.println("Age is less than 65)";

b) int x == 1, total == 0;

while (x <= 10)

{

total ++x;

System.out.println(x);

}

c) while (x <= 100)

total += x;

++x;

d) while (y =! 0)
{
System.out.println(y);