sample-answer-2.js

let students = [
  {name: '太郎', age: 15},
  {name: '花子', age: 14},
  {name: '次郎', age: 16},
];

let agedStudents = students.map(function(student) {
    return {name: student.name, age: student.age + 1};
});

console.log(agedStudents);
// [{name: '太郎', age: 16}, {name: '花子', age: 15}, {name: '次郎', age: 17}]