Hi guys, am having my final exams, I need to study. Maths isn't an easy unit, its really difficult. Please pardon me for using this time to revise. I'll be updating during my lunch break, at the hospital where I'll be attached. Sometimes I wish I was a primary or high school student. Life is somehow manageable. After three weeks, please feel free to check out chapter 21,22,&23. I'll make theses three chapters juicy and... adventurous.