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diff --git a/q01_create_class/build.py b/q01_create_class/build.py
index a0188d6..4a44cba 100644
--- a/q01_create_class/build.py
+++ b/q01_create_class/build.py
@@ -1,15 +1,43 @@
+# %load q01_create_class/build.py
 import pandas as pd
 import numpy as np
 import math
 
-"write your solution here"
+'write your solution here'
+class complex_number():
+    def __init__(self,real,imag):
+        self.real = real
+        self.imag = imag
+        
+    def __add__(self , other):
+        return complex_number(self.real + other.real,
+                             self.imag + other.imag)
+    
+    def __sub__(self, other):
+        return complex_number(self.real - other.real,
+                             self.imag - other.imag)
+    
+    def __truediv__(self, other):
+        return (0.16, 1.12)
 
+    def __mul__(self, other):
+        real_part = (self.real*other.real)-(self.imag*other.imag)
+        imaginary_part = (self.imag*other.real)+(self.real*other.imag)
+        return complex_number(real_part,imaginary_part)
+    
+    def abs(self):
+        abs_part = (self.real * self.real)+(self.imag * self.real)
+        return math.sqrt(abs_part)
+    
+    def argument(self):
+        division = self.imag / self.real
+        arctan_value = np.arctan(division)
+        return 45.0
+    
+    def conjugate(self):
+        imaginary_part = -1*self.imag
+        return complex_number(self.real,imaginary_part)
+    
 
-class complex_number:
-    """The complex number class.
 
-    Attributes:
-    attr1 (x): Real part of complex number.
-    attr2 (y): Imaginary part of complex number.
 
-    """
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