Write an expression that will cause the following code to print "I am a teenager" if the value of userAge is less than 20 1 import java.util.scanner 3 public class AgeChecker 4 public static void main (String [] args) f int userAge; scanner scnr = new Scanner(System.in); userAge = scnr.nextInt(); // Program will be tested with values: 18, 19, 20, 21. 7 10 if (/ Your solution goes here ) System.out.println("I am an adult"); 12 13 else System.out.println("I am a teenager") 15 16 17 18