Which of the following are valid identifiers? println $3 @2 5$ void Which of the following statements are true about the errors in the following code segment? public classs Simple { public static void main(String[] args) { X = 5; int div = 10; double y, div; y = 10; div = 7; There is an error on line 4 because the variable div cannot be declared and initialized on the same line. div cannot be redeclared. cannot assign value 10 to y because y is of double type. There is an error on line 3, as variable x has not been declared