/**
 * typedef {{name:string, age:number, job:string}} Person
 *
 */
const persons = [
  { name: "John", age: 30, job: "Developer" },
  { name: "Mary", age: 25, job: "Designer" },
  { name: "Peter", age: 27, job: "Developer" },
  { name: "Jane", age: 22, job: "Designer" },
  { name: "Bob", age: 33, job: "Developer" },
  { name: "Alice", age: 35, job: "Manager" },
  { name: "Tim", age: 32, job: "Designer" },
  { name: "Sara", age: 21, job: "Designer" },
  { name: "Tom", age: 34, job: "Developer" },
  { name: "Alex", age: 24, job: "Manager" },
  { name: "John", age: 30, job: "Manager" },
  { name: "Mary", age: 25, job: "Designer" },
  { name: "Peter", age: 27, job: "Developer" },
  { name: "Jane", age: 22, job: "Designer" },
  { name: "Bob", age: 33, job: "Developer" },
  { name: "Alice", age: 35, job: "Manager" },
  { name: "Tim", age: 32, job: "Designer" },
  { name: "Sara", age: 21, job: "Designer" },
  { name: "Tom", age: 34, job: "Developer" },
  { name: "Alex", age: 24, job: "Developer" },
];

/**
 * averageAge.
 *
 * @param {Person[]} persons
 */
function averageAge(persons) {
  // placehlder
}

console.log(averageAge(persons));

/**
 * listJobs.
 *
 * @param {Person[]} persons
 */
function listJobs(persons) {
  // placehlder
}

console.log(listJobs(persons));