How old are layers B-J if the ages of igneous intrusions is as follows: F is 1.8 billion years old A is 0.7 billion years old E is 0.6 billion years old Group of answer choices younger than 0.6 billion years between 0.6 and 0.7 billion years between 0.7 and 1.8 billion years older than 1.8 billion years