//Задачка №3
function parent1() {
  var multiplier = 3;
  return [33, 77, 99, 81, 55].map(
    function(I) {
      return  I * multiplier
    }
  );
}

function parent2() {
  this.multiplier = 3;

  function multiplierFun(I) {
    return  I * this.multiplier
  }

  return [33, 77, 99, 81, 55].map(multiplierFun);
}

console.log(parent1());
console.log(parent2());