<identifier> expected

class ex5{
public static void main(String[] args) {
    int[] mas1= new int[5];
    for (int i=0;i<mas1.length ;i++ ) {
        mas1[i]=(int)(Math.random()*10);
        System.out.print(mas1[i]);
    }
}
ex5Helper test= new ex5Helper();
test.maxNum(mas1);
test.minNum(mas1);
test.avrNum(mas1);
}
class ex5Helper{
public void maxNum(int[] maxArrayEnter){
    for (int cells:maxArrayEnter) {
        int max=0;
        if(cells>max){
            max=cells;
        }
    }
System.out.println("min number is"+min);
}
public void minNum(int[] minArrayEnter){
    for (int cells:minArrayEnter) {
        int min=10;
        if(cells<min){
            min=cells;
        }
}
System.out.println("min number is"+min);
}
public void avrNum(int[] avrArrayEnter){
int count=avrArrayEnter.length;
int avr=0;
for(int i=0;i<count;i++){
    avr=avr+avrArrayEnter[i];
    avr=avr/count;
}
System.out.println("min number is"+min);
}
}

компилятор выдает

ex5.java:10: error: <identifier> expected
        test.maxNum(mas1);
                   ^
ex5.java:10: error: <identifier> expected
        test.maxNum(mas1);
                        ^
ex5.java:11: error: <identifier> expected
        test.minNum(mas1);
                   ^
ex5.java:11: error: <identifier> expected
        test.minNum(mas1);
                        ^
ex5.java:12: error: <identifier> expected
        test.avrNum(mas1);
                   ^
ex5.java:12: error: <identifier> expected
        test.avrNum(mas1);