제1강: https://www.youtube.com/watch?v=EI3EdrmFH0E&index=1&list=PLxx5mQ0XoZY3BpgridTcq-SaM8NJjfKAg

제2강: https://www.youtube.com/watch?v=ZcsPFO7bsXA&list=PLxx5mQ0XoZY3BpgridTcq-SaM8NJjfKAg&index=2

제3강: https://www.youtube.com/watch?v=ZQLqQ6FDT9Q&list=PLxx5mQ0XoZY3BpgridTcq-SaM8NJjfKAg&index=3