Set up the most powerful defense in Clash of Clans #2

Hello. Well the last time I post about powerful defense is for Town Hall is 5-6. Now I will post for the beginner how to create a powerful defense for Town Hall Lv. 4-5. You have to make sure that you have 2 Cannons at least. And 2 Archer tower, and you have to be at least, Lv.2 mortar. We all know that you have to put mortar at the ncenter of the village.(go to part 2)