Represent the three relations shown below as a single JSON document. (Try http://jsonlint.com/ for an easy way to check the validity of your JSON document.) There is more than one way to represent these relations in JSON. Please begin your document with a collection of Suppliers, each containing a collection of parts they sell and the price at which those parts are sold. Then find a reasonable way to include parts not sold by any supplier. In addition, explain whether this representation avoids redundancy