Explore the locality by changing the random selection code in the getNextOptimisticPeer() function to consider the round-trip delay. For example, you may give preference to peers with lower roundtrip...

Explore the locality by changing the random selection code in the getNextOptimisticPeer() function to consider the round-trip delay. For example, you may give preference to peers with lower roundtrip delay. Discuss why it is important to consider locality in choosing optimistic unchoke peers. Note that optimistic unchoke plays an initiation role for finding potential tit-for-tat peers.