2.
Eight boys B1,B2,B3,B4,B5,B6,B7 and B8 are sitting in a row facing towards the north. B6 is fifth to the right of B1. B4 is fifth to the right of B5. B5 is to the immediate right of B1. B8 is third to the left of B4. B2 is third to the right of B7. B7 is an immediate neighbour of B1. Who is sitting on the immediate left of B1?