Problem Statement: Student Grade Calculator

Your task is to create a simple Java program to calculate a student's grade. This problem is designed to help you practice using **classes**, **objects**, and **encapsulation** to create a well-structured solution.

Functional Requirements

Student Data: A student record must store the student's name and scores for three subjects (e.g., Math, Science, and English).
Calculations: The program should be able to calculate the student's total score and average score.
Grading: Based on the average score, assign a letter grade according to the following scale:
- Average >= 90: 'A'
- Average >= 70: 'B'
- Average >= 50: 'C'
- Average < 50: 'F'
Report: The system must display a full report for a student, including all their information, scores, and final grade.

Technical Requirements

Create a Student Class: Design a single class named Student to represent a student's data and actions.
Use Encapsulation:
- The fields for the student's name and scores must be declared as **private**.
- You will use a constructor to initialize the fields and public methods to perform calculations and display the report.
Methods:
- A constructor to create a Student object with a name and three scores.
- public double calculateAverageScore(): A method to calculate and return the average score.
- public char getGrade(): A method to determine and return the letter grade based on the average score.
- public void displayReport(): A method that prints all student information and the final grade in a clear format.
Demonstrate in Main: In your `main` method, create at least one `Student` object and call the `displayReport()` method to show it works.

Testing Requirements

Your main method must demonstrate the program works by testing the following scenarios:

Passing Student (Grade A or B): Create a `Student` object with scores that result in a high passing grade (e.g., 95, 90, 88). The output should show the correct average and grade.
Failing Student (Grade F): Create a `Student` object with scores that result in a failing grade (e.g., 40, 45, 50). The output should show the correct average and an 'F' grade.