Assertions

	For each of the five points labeled by comments, identify each of the assertions in the table below as either being always true, never true, or sometimes true / sometimes false. (You may abbreviate them as A, N, or S.) 

// Reads many integers from Scanner; returns the second smallest
// integer read.
public static int secondSmallest(Scanner console) {
	int num = console.nextInt();
	int first = num;
	int second = num;
	<span class="assertionpoint">// Point A
	while (num >= 0) {
		<span class="assertionpoint">// Point B
		if (num < first) {
			second = first;
			first = num;
			<span class="assertionpoint">// Point C
		} else if (num < second) {
			second = num;
		}
		<span class="assertionpoint">// Point D
	}
	num = console.nextInt();
	<span class="assertionpoint">// Point E
	return second;
}

1) num < 0

2) first < second 

3) num >= second