Create a inventory management system that implements merge sort. The program must include the following functions: 1) A function that adds an item name and a unique 7 digits number inputted by user and quantity into a text file and then performs a merge sort. 2) A search function that uses binary search to search an item using its unique number and then output its corresponding name and quantity. 3) A function that edit the quantity of an item. All searching should be binary search. All code must not copy from any source. Merge sort and binary search can be copied but it must be rewritten in order to be used in the program. Comments are needed to explain what the program does. Code must be modelarized. All source file including .h .cpp .hpp and any data files are needed. Screenshots are also needed.