Write a C program that reads sales data from a file called sales. txt. Each line of the file contains four data items; 1. A product number which is an integer 2. A product name which is a string no longer than 12 characters and which does not contain spaces 3. A unit price which is a double 4. A number of units sold which is an integer The program will output the two products which generated the highest total revenue (unit price * number sold). Your program must: 1. Read each line of the file storing the four items into the members of a dynamically allocated structure. 2. Store pointers to the structures in an array. 3. Sort the array of pointers by total revenue 4. Display the product name and total revenue of the top two products 5. The program must work for sales. txt files with anywhere from 2 to 100 products