You are provided with the implementation of the models required for all the APIs. The task is to implement a set of REST services that exposes the endpoints and allows for filtering and sorting the collection of product records in the following ways:

GET request to$/$filter$/$price$/\{$initial$\_$range$\}/\{$final$\_$range$\}$:

returns a collection of all products whose price is between the initial and the final range supplied

The response code is $200,$ and the response body is an array of products in the price range provided.

In case there are no such products return status code $400.$

GET request to$/$sort$/$price:

returns a collection of all products sorted by their pricing

The response code is $200$ and the reppanse body is an array of the product names sorted in ascending ofder of price

Complete the given project so that it passes all the test cases when running the provided unit tests.

Example requests and responses