Final Term Practical Session Problem 3, 4 and Bonus. -- Update readme.md

Bonus for Problem 3b, and minor typos.

readme.md

@@ -141,8 +141,8 @@ added with some new features related to his idea.
 Make sure you create it the best you can. 
 There are no specific requirements. Impress and surprise the owner. 
 Be creative, such as show the name of the pets, number of descendants
-or possibly other thing such as picture or other clans of each animal
-or possibly picture (if you have times) 
+or possibly other things such as other clans, or biggest clan of each animal
+or possibly picture (if you have times). 
 
 Having continue with your previous works of applying the appropriate 
 design pattern for pet heritage traversal, write a brief description 
@@ -152,7 +152,7 @@ and ease you in implementing the feature or not.
 Write the URL of your running application.
 
 Make sure you apply Clean Code, CI/CD and TDD. 
-To prove the application of TDD. Make sure you have several separate 
+To prove the application of TDD. Make sure you have several  
 commits of unit test in the repository 
 before you implement the function. 
 
@@ -166,15 +166,10 @@ of the owner vision of having a unique feature/information of the clinic.
 ## Problem 3b: Vets Cost
 ### Maximum score: 80 points (you can solve the problem even if you haven't solved/understood the previous one)
 
-The vets have a cost price for one visit for any type of animals.
+Every vets have a fix price for one visit for any type of animals.
 (The cost for any type of animal is the same) 
 Modify the model and also the database to add field about price in each vets. 
-In the list of visit, show the cost of the visit.
-
-Make sure you apply Clean Code, CI/CD and TDD. 
-To prove the application of TDD. Make sure you have separate 
-commit for the unit tests in the repositroy 
-before you implement the function. 
+In the list of visit, show the cost of each visit.
 
 Write a brief explanation in your readme.md of how you solve this problem.
 Write the URL of your running application. 
@@ -183,6 +178,9 @@ To prove the application of TDD. Make sure you have several separate
 commits of unit test in the repository 
 before you implement the function. 
 
+**Bonus:** (additional 20 points) If you can calculate information of the total
+pets owner have paid for their pets`s visit. 
+Show the total cost in the list of pets owner, and list of pets. 
 
 ## Problem 4: Group Project Contribution.
 ### Begin Monday, 20 May 2019 at 10:00 - 12:30