diff --git a/banking_app/login.py b/banking_app/login.py
index 2bbab36..2ffea2a 100644
--- a/banking_app/login.py
+++ b/banking_app/login.py
@@ -1,4 +1,6 @@
 # login.py - Placeholder for login functionality
+import string
+import hashlib
 
 def login(username, password):
     """
@@ -33,3 +35,19 @@ def login(username, password):
     - bool: `True` if login is successful, `False` if login fails, or raises a `ValueError` for invalid input.
 
     """
+   
+    special_characters = "!@#$%^&*()_+-=[]{}|;:'\,.<>?/`~"
+    users = {"user1": hashlib.sha256("password123".encode()).hexdigest()}
+    if username == "" or password == "":
+        raise ValueError
+    if any(i in  username for i in special_characters):
+        raise ValueError
+    if not username:
+        return False 
+    if username in users:
+        stored_password = users[username]
+        return stored_password == hashlib.sha256(password.encode()).hexdigest()
+    return False
+    
+
+login("fjbnrf","furjg#")
\ No newline at end of file
diff --git a/banking_app/user_management.py b/banking_app/user_management.py
index fd7d1e0..26ca2cb 100644
--- a/banking_app/user_management.py
+++ b/banking_app/user_management.py
@@ -1,4 +1,4 @@
-import csv
+ bimport csv
 
 DATABASE_FILE = "banking_app/database.csv"
 
diff --git a/functions_to_test.py b/functions_to_test.py
index 330fa02..c6dc857 100644
--- a/functions_to_test.py
+++ b/functions_to_test.py
@@ -1,34 +1,81 @@
 # Placeholder functions for Python basics, to be implemented later
+import math
+
 
 def add_numbers(a, b):
-    pass
+    return(a+b)
+
 
 def find_maximum(a, b, c):
-    pass
+    list1 = [a,b,c]
+    return(max(list1))
+print(find_maximum(4,5,6))
 
 def is_palindrome(string):
-    pass
+    if type(string) == str:
+        string = string.lower()
+        string1 = string[::-1]
+        return(string==string1)
+    else:
+        raise TypeError
 
 def count_word_occurrences(text, word):
-    pass
+   if type(word) == str and type(text) == str:
+        text1 = text.lower()
+        word1= word.lower()
+        word_count = text1.count(word1)
+        return (word_count)
+   else:
+       raise TypeError
+
+            
 
 def read_file_lines(filepath):
-    pass
+    with open(filepath,"r") as file:
+        lines = file.readlines()
+        return(lines)
 
 def factorial(n):
-    pass
+    if n < 0:
+        raise ValueError
+    elif type(n) != int:
+        raise TypeError
+    from math import factorial as factors
+    return factors(n)
+
 
 def is_prime(n):
-    pass
+    if n < 0 :
+        raise ValueError
+    elif n <= 1:
+        return False
+    elif type(n) != int :
+        raise TypeError
+    for i in range(2,n):
+        if n % i == 0:
+            return False
+    return True 
 
 def sort_numbers(numbers):
-    pass
+    for i in numbers:
+        if type(i) == str:
+            raise TypeError
+    return sorted(numbers)
 
 def factorial(n):
-    pass
+    if n < 0:
+        return ""
+    elif type(n) != int:
+        raise TypeError
+    from math import factorial as factors
+    return factors(n)
 
 def fibonacci(n):
-    pass
+    if n == 0:
+        return 0 
+    elif n == 1:
+        return 1  
+    return(fibonacci(n-1)+fibonacci(n-2))
 
 def tower_of_hanoi(n, source, auxiliary, target):
     
@@ -52,7 +99,12 @@ def tower_of_hanoi(n, source, auxiliary, target):
 
 class Person:
     def __init__(self, name, age):
-        pass
+        if type(name) == str and type(age) == int:
+            self.name = name
+            self.age = age
+            return
+        else:
+            return TypeError
 
 
 if __name__ == "__main__":