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Code, edit and compile here:
\documentclass[a4paper,14pt]{article}%\usepackage[T2A]{fontenc}\usepackage[utf8]{inputenc}%\usepackage[english]{babel}\usepackage{tikz}\usepackage {amsmath}\usepgflibrary{arrows} % LATEX and plain TEX and pure pgf\usetikzlibrary{arrows} % LATEX and plain TEX when using Tik Z\usepackage{amssymb,amsfonts,amsmath,enumerate,float}\usepackage{color}\usepackage{indentfirst}\definecolor{green}{rgb}{0,0.6,0}\definecolor{gray}{rgb}{0.5,0.5,0.5}\definecolor{mauve}{rgb}{0.58,0,0.82}\definecolor{orange}{rgb}{1,0.5,0}\usepackage{geometry}\parindent=1cm\usepackage{tikz}\usepackage{pgfplots}\pgfplotsset{width=14cm, height = 9cm}\usetikzlibrary{calc,intersections,through,backgrounds}\tikzset{help lines/.style=very thin}