Fixed error in BFS model answer. Fixed graphBFSPE eslint errors.
Fixed error in BFS model answer. Fixed graphBFSPE eslint errors.

RJFreund/OpenDSA,RJFreund/OpenDSA,RJFreund/OpenDSA,RJFreund/OpenDSA,RJFreund/OpenDSA,RJFreund/OpenDSA,RJFreund/OpenDSA,RJFreund/OpenDSA