diff --git a/README.md b/README.md
index eb43e3d5c2835d606cc4232ccb9603ea04011a1c..ef51be5845222346ffae1d42f0fb52c05dc89313 100644
--- a/README.md
+++ b/README.md
@@ -168,7 +168,7 @@ while True:
 
 # Task 5
 
-## Taking notes:
+### Taking notes...
 
 ## Ohm's law:
 `V = I * R` to calculate Voltage
@@ -186,7 +186,7 @@ R = Resistance
 
 `R = V / I` to calculate Resistance
 
-### Additionally
+### Additionally...
 
 >Ohm’s law states that the voltage (V) across a resistor is proportional to the current (I), where the constant of proportionality is the resistance (R). 
 
@@ -198,7 +198,7 @@ R = Resistance
 
 `R = R1 + R2 + ... + Rn`
 
-## This can be implemented in Python using pint
+## This can be implemented in Python using 'pint' library
 
 ```
 import RPi.GPIO as GPIO
@@ -214,7 +214,8 @@ voltage = (resistance * current).to('volt')
 ### Moreover, I have created an `ohms_law.py` and `tests.py` in the /ohms_law directory.
 
 Example (testing resistance function):
-Expected output from 30V and 3A = 10Ω
+Expected output from **30V and 3A = 10Ω**
+
 ```
 def test_resistance_calculation():
     # Test when voltage is 24 V and current is 6 A
@@ -237,7 +238,7 @@ if __name__ == '__main__':
 ```
 
 ### Other functions have been implemented
-*Final code (ohms_law.py)*
+*Final code (ohms_law.py):*
 
 ```
 import pint
@@ -267,9 +268,14 @@ def calculate_resistance(voltage, current):
 
     resistance = voltage / current
     return resistance
+
+def calculate_serial_resistance(rs):
+    # Calculate the total resistance for resistors in series (r_total = R1 + R2 + ... = Rn)
+    r_total = sum(rs)
+    return r_total
 ```
 
-*Final code (tests.py)*
+*Final code (tests.py):*
 
 ```
 import pint
diff --git a/ohms_law/ohms_law.py b/ohms_law/ohms_law.py
index b19bcfed9c53055cee4b5a23a2cafd5088a11a58..3716db9819588c8fc7efbf3c5fc8a67b89bc303b 100644
--- a/ohms_law/ohms_law.py
+++ b/ohms_law/ohms_law.py
@@ -24,4 +24,9 @@ def calculate_resistance(voltage, current):
     current = current * ureg.ampere
 
     resistance = voltage / current
-    return resistance
\ No newline at end of file
+    return resistance
+
+def calculate_serial_resistance(rs):
+    # Calculate the total resistance for resistors in series (r_total = R1 + R2 + ... = Rn)
+    r_total = sum(rs)
+    return r_total
\ No newline at end of file