diff --git a/banking_app/login.py b/banking_app/login.py
index 2bbab36..63852b1 100644
--- a/banking_app/login.py
+++ b/banking_app/login.py
@@ -1,4 +1,5 @@
 # login.py - Placeholder for login functionality
+import csv
 
 def login(username, password):
     """
@@ -33,3 +34,38 @@ def login(username, password):
     - bool: `True` if login is successful, `False` if login fails, or raises a `ValueError` for invalid input.
 
     """
+    if not username or not password:
+        raise ValueError("The fields are empty")
+    
+    symbols = ['!', '@', '#', '$', '%', '&', '*', '?', '~']
+
+    for n in symbols:
+        if n in username:
+            raise ValueError
+    if username == '':
+        raise ValueError
+    elif password == "":
+        raise ValueError
+    else:
+        return username, password
+
+def checking_info(username, password):
+    with open ("database.csv", mode='r') as f:
+        contents = csv.DictReader(f)
+        for line in contents :
+            if line["username"] == username:
+                if line["password"] == password:
+                    return True
+                else:
+                    return False
+
+    return False
+                
+
+            
+
+            
+
+
+    
+
diff --git a/banking_app/signup.py b/banking_app/signup.py
index a920e5b..f783b06 100644
--- a/banking_app/signup.py
+++ b/banking_app/signup.py
@@ -1,4 +1,5 @@
 # signup.py - Placeholder for signup functionality
+import re
 
 def signup(username, password, email):
     """
@@ -35,3 +36,31 @@ def signup(username, password, email):
     Returns:
     - bool: `True` if the signup is successful, otherwise raises a `ValueError` for invalid input.
     """
+    
+    if not username or not password or not email:
+        raise ValueError("The fields must not be empty")
+    
+
+    email__ = r'^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$'
+    if not re.match(email__, email):
+        raise ValueError("Invalid email format")
+    
+    if len(password) < 8:
+        raise ValueError("Password must be at least 8 characters long")
+    
+    if not any(character.islower() for character in password):
+        raise ValueError("Password must contain at least one lowercase letter")
+    
+    if not any(character.isupper() for character in password):
+        raise ValueError("Password must contain at least one uppercase letter")
+    
+    if not any(character.isdigit() for character in password):
+        raise ValueError("Password must contain at least one digit")
+
+    
+    return True
+
+    
+    
+    
+    
\ No newline at end of file
diff --git a/functions_to_test.py b/functions_to_test.py
index 330fa02..2d7c034 100644
--- a/functions_to_test.py
+++ b/functions_to_test.py
@@ -4,31 +4,58 @@ def add_numbers(a, b):
     pass
 
 def find_maximum(a, b, c):
-    pass
+    return max(a, b, c)
 
 def is_palindrome(string):
-    pass
+    return string == string[::-1]
 
 def count_word_occurrences(text, word):
-    pass
+    text = text.lower()
+    word = word.lower()
+    words = text.split()
+    count = words.count(word)
+    
+    return count
 
 def read_file_lines(filepath):
-    pass
+    with open(filepath, 'r') as f:
+        contents = f.readlines
+    return contents
 
 def factorial(n):
-    pass
+    x = 1
+    for i in range(1,n+1):
+        x*= i
+    return x
 
 def is_prime(n):
-    pass
+    if not isinstance(n, int):
+        raise TypeError(f"{n} is not an integer. Input must be an integer.")
+    
+    if n <= 1:
+        raise ValueError(f"{n} is not a prime number")
+    for i in range(2, int(n**0.5) + 1):
+        if n % i == 0:
+            raise ValueError(f"{n} is not a prime number")
+    return True
+
 
 def sort_numbers(numbers):
     pass
 
 def factorial(n):
-    pass
+    x = 1
+    for i in range(1,n+1):
+        x*= i
+    return x
+
 
 def fibonacci(n):
-    pass
+    if n == 0:
+        return 0
+    if n == 1:
+        return 1
+    return fibonacci(n-1) + fibonacci(n-2)
 
 def tower_of_hanoi(n, source, auxiliary, target):
     
@@ -48,7 +75,12 @@ def tower_of_hanoi(n, source, auxiliary, target):
     >>> tower_of_hanoi(3, 'A', 'B', 'C')
     [('A', 'C'), ('A', 'B'), ('C', 'B'), ('A', 'C'), ('B', 'A'), ('B', 'C'), ('A', 'C')]
     """
-    pass
+    if n == 1:
+        
+        print(f"Move disk 1 from {source} to {target}")
+        return
+    
+    
 
 class Person:
     def __init__(self, name, age):