Write the function in python.

a) Binary Tree. Write a function in file pl.py with signature binary_tree(depth, length) that draws a binary tree figure like that from Figure 1 using the turtle module. The figure produced is similar to the example from the textbook with a significant difference that you will notice immediately: the left branches align on a right(60) angle from the vertical and the right branches all align on a left(60) angle from the vertical. The binary tree drawing must look like that from Figure 1, except the dots are NOT required: Figure 1. Binary tree produced by calling binary_tree(160, 5), with dots shown at starting points for clarification. Include a screenshot of the figure drawn by the call binary_tree(6, 160). To get credit for part a): e do not change the function signature, do NOT draw any black dots, the screenshot must be of the figure drawn by the call binary_tree(6, 160)