Precision and Recall of Retrieval Stages & Map Score Question /// Info Retrieval Systems

Consider an information need for which there are 4 relevant documents in the collection. Contrast two systems run on this collection. Their top 10 results are judged for relevance as follows (the leftmost item is the top ranked search result):

System 1 R N R N N N N N R R System 2 N R N N R R R N N N

Evaluate the precision and recall at each stage of retrieval.

Which system has the better MAP score ?