Please write the following code in Java. Below is a program written to calculate an invoice total. Analyze and modify the program to design an object-oriented solution by using the three layers architecture, and provide source code to include the following: It is important to do what is in bold. For each layer, they must be a separate class. So in total of 3 classes.

A business rule layer with methods to manipulate data (i.e., Constructor(s), mutators, accessor, customized methods, and others)

A Database layer for data processing

An user interface layer to test your application

Exception handling statements that handles exceptions when they occur.

Overloaded methods

StringBuilder to print results

Test runs

Note: Provide an object-oriented design solution for the Java application: