please circle the correct answer for questions 2, 3, and 4 based on the tree. make sure your answers are correct and I promise to give you a thumbs up

2) For the tree below, the depth of node E is a)0 b)1 c) 2 d) 3 3) For the tree below, the height is a) o b) 1 c) 2 d) 3 e) 4 4) For the tree below, the external nodes are a) D, E, F, G b) A B C c) There are no external nodes