The videos we watched: https://www.youtube.com/watch?v=oBxosZ6Hd7Y https://www.youtube.com/watch?v=s_fcTrZUvLo&list=PL4ziQDgKv4EpM_WbXSFRwFFd5n9yVTsO0&index=12 https://www.youtube.com/watch?v=4_AeKsEj9VM&list=PLm_cnYSOWBw3pkj6zMjkgGhFCDlqm6nCD&index=13 https://www.youtube.com/watch?v=oNT4hJ4m1nY&list=PL4ziQDgKv4EpM_WbXSFRwFFd5n9yVTsO0&index=15 https://www.youtube.com/watch?v=JIKGW5KUfHw&list=PLm_cnYSOWBw3pkj6zMjkgGhFCDlqm6nCD&index=5 https://www.youtube.com/watch?v=oBxosZ6Hd7Y https://www.youtube.com/watch?v=s_fcTrZUvLo https://www.youtube.com/watch?v=4_AeKsEj9VM https://www.youtube.com/watch?v=GVrWCSJGqGc https://www.youtube.com/watch?v=oNT4hJ4m1nY