public void Extra(){
    // Class Averages
    int[] classScores = {75,83,87,91};
    System.out.print(arraySum(classScores));
    System.out.println("/400 is the class average");

   //Student Scores
    int[][] student = {
    {90,85,92,78},
    {88,91,89,95},
    {91,95,89,98},
    {72,75,83,85},
    {37,61,73,54}
   };
   String[] studentNames = {"Jerry","Bobby","John","Ted","Amanda"};
   int[] studentScores = rowSums(student);
   int max = 0;
   int highestScorer = 0;
   System.out.println("The scores each person got are: ");
   for (int i = 0; i<studentScores.length;i++){
    System.out.println(studentNames[i] + ": "+ Integer.toString(studentScores[i]) + " ");
    if (studentScores[i]/(student[0].length) > max){
        max = studentScores[i]/(student[0].length);
        highestScorer = i;
    }
   }
   boolean diverse = isDiverse(student);
   if (diverse){
    System.out.println("All of the scores are different from each other");
   } else{
    System.out.println("At least two scores are the same");
   }
   System.out.println("The highest scorer is " + studentNames[highestScorer] + " with an average of " + Integer.toString(max));
}
|   import com.fasterxml.jackson.databind.JsonNode;

package com.fasterxml.jackson.databind does not exist