And Abel

 Was able to 

But possibly

 Sugar cane 

So Cain

 Since it probably wasn't cocaine 

So we read what happened

 But their names

Abel sheep

 He gave the first one to God 

Cain started doing whatever

 Then thought about God 

So now name

 Cain and able 

God could have told

 Somebody else to build the ark there was other people 

God didn't tell you to build a ark

 He told Noah 

Idk

 How much time passed between the first chapter and 8 pages into the first book of the Bible that Moses wrote but page wise 

By page 8

 In this Bible brought the waters back to