In this problem we will investigate some properties of a full 7-ary tree. A full 7-ary tree is a rooted tree in which every node has either 0 or 7 children. In a full tree, a nonleaf node is called an internal node. Suppose you know that a full 7-ary tree has 36 nodes. How many leaves does it have? 31 9 Now generalize your response to the previous part: suppose you know that a full 7ary tree has 0, nodes. Give an exact expression for the number of leaves: symbolic expression 9