Construct a solution algorithm for the following programming problems. Your solution should contain:

• A defining diagram
• A pseudocode algorithm
• A desk check of the algorithm

Design a program that will read a file of product records. each containing the item number. the item name. the quantity sold this year and the quantity sold last year. The program is to produce a product list showing the item number. the item name, and the increase or decrease in the quantity sold this year for each item.