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diff --git a/q01_create_class/build.py b/q01_create_class/build.py
index a0188d6..3ae5486 100644
--- a/q01_create_class/build.py
+++ b/q01_create_class/build.py
@@ -1,15 +1,45 @@
-import pandas as pd
-import numpy as np
-import math
-
-"write your solution here"
 
+import math
 
 class complex_number:
-    """The complex number class.
+    def __init__(self, real, imag=0.0):
+        self.real = real
+        self.imag = imag
+    
+    def __str__(self):
+        return str(self.real) + ' + i' + str(self.imag)
 
-    Attributes:
-    attr1 (x): Real part of complex number.
-    attr2 (y): Imaginary part of complex number.
+    ##This function adds two complex numbers. Returns result as another complex number##
+    def __add__(self,other):
+        return complex_number(self.real + other.real,
+                       self.imag + other.imag)
+    
+    ##This function subtracts two complex numbers. Returns result as another complex number##
+    def __sub__(self,other):
+        return complex_number(self.real - other.real,
+                       self.imag - other.imag)
+    
+    ##This function multiplies two complex numbers. Returns result as another complex number##
+    def __mul__(self, other):
+        return complex_number(self.real * other.real - self.imag * other.imag,
+                       self.imag * other.real + self.real * other.imag)
+    
+    ##This function finds division of two complex numbers. Returns result as another complex number##
+    def __truediv__(self, other):
+        base = float(math.pow(other.real,2) + math.pow(other.imag,2))
+        r = self.real * other.real + self.imag * other.imag
+        i = self.imag * other.real - self.real * other.imag
+        return (r/base, i/base)
+    
+    ##This function finds conjugate of complex number.##
+    def conjugate(self):
+        return complex_number(self.real, -self.imag)
+    
+    ##This function finds absolute of complex number.##
+    def abs(self):
+        return math.sqrt(math.pow(self.real,2) + math.pow(self.imag,2))
+    
+    ##This function finds argument of complex number in degrees.##
+    def argument(self):
+         return math.degrees(math.atan(self.imag / self.real))
 
-    """
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