The rooted Fibonacci trees Tn are defined recursively in the following way. T1 and T2 are both the rooted tree consisting of a single vertex, and for n = 3, 4, . . . , the rooted tree Tn is constructed from a root with Tn−1 as its left subtree and Tn−2 as its right subtree.
Draw the first seven rooted Fibonacci trees.