Please show your work, and I will upvote right away for the correct answer.

There is a town with h buildings that are connected by roads, where b a 2. Each building has 1' or more . . . bZ . . . roads that connect to It, With 1\" a 1. Prove that If T Z} 2 , then It IS pOSSlhle to walk along roads from anllr building to any other building