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

a.
```
if ( age >= 65 );
document.writeln( "Age greater than or equal to 65" );
else
document.writeln( "Age is less than 65 )";
```
b.
```
var x = 1, total;
while ( x <= 10 ) {
total += x;
++x;
}
```
c.
```
While ( x <= 100 )
total += x;
++x;
```
d.
```
while ( y > 0 ) {
document.writeln( y );
++y;
```

a.
1. Semicolon at the end of the if condition should be removed.
2. The closing double quote of the second document.writeln should be inside of the closing parenthesis.
b.
The variable total should be initialized to zero.
c.
1. The W in While should be lowercase.
2. The two statements should be enclosed in curly braces to properly group them into the body of the while other-
wise the loop will be an infinite loop.
d.
1. The ++ operator should changed to --.
2. The closing curly brace for the while loop is missing.