1.
Array.prototype.findLast()
  const nums = [1, 2, 3, 4, 5];
  const cb = (el) => el % 2 === 0;
  console.log(nums.findLast(cb));  // 41.
Array.prototype.findLast()
  const nums = [1, 2, 3, 4, 5];
  const cb = (el) => el % 2 === 0;
  console.log(nums.findLast(cb));  // 4