### maxN

Returns the `n` maximum elements from the provided array. If `n` is greater than or equal to the provided array's length, then return the original array(sorted in descending order).

Use `Array.sort()` combined with the spread operator (`...`) to create a shallow clone of the array and sort it in descending order.
Use `Array.slice()` to get the specified number of elements.
Omit the second argument, `n`, to get a one-element array.

```js
const maxN = (arr, n = 1) => [...arr].sort((a, b) => b - a).slice(0, n);
```

```js
maxN([1, 2, 3]); // [3]
maxN([1, 2, 3], 2); // [3,2]
```