Q: A(2,3), B(8,9). Find (a) midpoint (b) point dividing AB internally 2:1 (c) externally 2:1. (a) Midpoint: (5, 6). (b) Internal 2:1: ((2·8+1·2)/3, (2·9+1·3)/3) = (6, 7). (c) External 2:1: ((2·8-1·2)/1, (2·9-1·3)/1) = (14, 15).