Answer:
"Andrew says this because he had been able to keep his promise given to Joe Morgan; he had been able to save Mrs. Morgan as well as his newly born baby after it had been born lifeless. It means Andrew felt contented and jubilant at his own efforts and the achievement."
Answer:
ROB
Explanation:
Rob is the complete subject since he is the main "character" in the sentence. Mary is secondary. 'Rob' sent a letter to (blank). Without Rob, we wouldn't be reading about sending a letter. Hope that makes sense!