Problem 3 a. What is the minimum number of external nodes for a proper binary tree with height h'? Justify your answer. b. What is the maximum number of external nodes for a proper binary tree with height h? Justify your answer. Let I be a proper binary tree with height h and n nodes. Show that c. log(n+1-1Sh (n-1)/2 Problem 3 a. What is the minimum number of external nodes for a proper binary tree with height h'? Justify your answer. b. What is the maximum number of external nodes for a proper binary tree with height h? Justify your answer. Let I be a proper binary tree with height h and n nodes. Show that c. log(n+1-1Sh (n-1)/2