## Slicer

### Instructions

Create a function named `slice` that works like `Array.slice()` and `String.slice()`.

It takes 3 arguments:
- string or array to process.
- starting index.
- optional ending index.

### Notions

- [Array.slice](https://devdocs.io/javascript/global_objects/array/slice)

### Code provided

> The provided code will be added to your solution, and does not need to be submitted.

```js
Array.prototype.slice = undefined
String.prototype.slice = undefined
```