1. What is the relationship, if any, between the Abrahamic covenant and Romans 11:29?

2. Hebrews 7:3 Melchisedec according to the text, was "without father, without mother". 
Explain this figure of speech.

3. In Genesis 12:3, 18:18, 22:18, 26:4, and 28:14, Abraham is informed that he will be a "blessing to all nations". What does this mean?

4. What is happening in Genesis 15:5-6? (Hint: Galatians 3:6,16 ; Romans 10:18)