Create a function that takes two arguments of an array of numbers arr and a constant number n and returns the n largest numbers from the given array.
largestNumbers(2, [4, 3, 2, 1]) ➞ [3, 4]
largestNumbers(1, [7, 19, 4, 2]) ➞ [19]
largestNumbers(3, [14, 12, 57, 11, 18, 16]) ➞ [16, 18, 57]
largestNumbers(0, [1, 3, 4, 2]) ➞ []
The returned array must be sorted in ascending order.