In "else if" program 4 errors are coming

#1

my code is not running

import java.util.Scanner;

public class Main
{
public static void main(String args[])
{
Scanner src=new Scanner(System.in);
int age=src.nextInt();
System.out.println(age);

    if(age<=11)
    {
        System.out.println("child");
    }
   else if( age >=12 && <=18)
    {
        System.out.println("teenager");
    }
     else if( age >=19 && <=60)
    {
        System.out.println("adult");
    }
     else ( age >60)
    {
        System.out.println("old");
    }
}

}