feat: adds Rashaad's code samples (#146)

* Create RM_README.md

Creates folder for lesson 04

* feat: RM_README.md_lesson_04

Lesson_04 completed using "C#" and "C++".

* typo

Author: RMillerCohort251

lesson_04/rasheedmiller/RM_README.md

@@ -0,0 +1,80 @@
+## C# Implementation
+
+```c#
+using System;
+
+class Program
+{
+    static bool IsPrime(int number)
+    {
+        if (number < 2)
+            return false;
+        
+        for (int i = 2; i <= Math.Sqrt(number); i++)
+        {
+            if (number % i == 0)
+                return false;
+        }
+        return true;
+    }
+
+    static void Main()
+    {
+        Console.Write("Enter a number: ");
+        int num = int.Parse(Console.ReadLine());
+        
+        if (IsPrime(num))
+            Console.WriteLine($"{num} is a prime number.");
+        else
+            Console.WriteLine($"{num} is not a prime number.");
+    }
+}
+```
+
+## C++ Implementation
+
+```c++
+#include <iostream>
+#include <cmath>
+
+bool isPrime(int number) {
+    if (number < 2)
+        return false;
+    
+    for (int i = 2; i <= std::sqrt(number); i++) {
+        if (number % i == 0)
+            return false;
+    }
+    return true;
+}
+
+int main() {
+    int num;
+    std::cout << "Enter a number: ";
+    std::cin >> num;
+    
+    if (isPrime(num))
+        std::cout << num << " is a prime number." << std::endl;
+    else
+        std::cout << num << " is not a prime number." << std::endl;
+    
+    return 0;
+}
+```
+
+## Explanation
+
+The C# "C Sharp" implementation uses a function named `Is_Prime`. This function takes a `number` as input and reads `true` if the number is Prime or `false` if the number is not Prime.
+
+The C++ "C Plus Plus" implementation uses a function named `is_Prime`. This function also takes a `number` as input and reads `true` if the number is Prime or `false` if the number is not Prime.
+
+# Similarities and Differences Index Chart
+
+| Feature               | Similarities                                  | Differences                                   |
+|-----------------------|-----------------------------------------------|-----------------------------------------------|
+| **Syntax**            | The names of the functions are similar.          | C# uses "IsPrime". C++ uses "isPrime".  |
+| **Input**             | Both take user input.                            | One coded in C# language. One coded C++ language.|
+| **Main Function**     | Both have main functions.                        | C# uses "static void Main()" C++ uses "int main()"|
+| **First Line of Code** | Both have a line of code to start. | C# starts with "using System;". C++ starts with "#include <iostream>"|
+| **Printing Output**    | Both use printing outputs.          | C# uses "Console.WriteLine()". C++ uses "std::cout <<". |
+