Assume that a file named "inventory", which contains the inventory of parts for the Legendary Lawn Mower Company (from Section 10.5), already exists with records of the following form:

part_Number (Integer), part_Name (String), quantity (Integer)

Also assume that the records in this file are ordered by increasing part number. For each part of this problem, write a program that performs the indicated task.

a. Input a part number from the user and delete the corresponding record from the "inventory" file.

b. Input a part number and a quantity from the user and modify the record corresponding to that part number by changing the value of its last field to the quantity input.

c. Input a new part number, part name, and quantity from the user and insert the corresponding record in the proper place in the "inventory" file.