lec.1
https://drive.google.com/file/d/1845NTtPMWPhdV_bqtTYdHBOsbMKSp9A2/view?usp=sharing
lec.2
https://drive.google.com/file/d/1cHV7WhRIii5v6msJT9a9L6h5hyqSZgHf/view?usp=sharing
lec.3
https://drive.google.com/file/d/1MBl1V57JNS7dYCTG64hJ3NB1L7NXqqkF/view?usp=sharing
lec.4
https://drive.google.com/file/d/1W5Xo-JliyUEanTaBzgosYw7PhpgEgXku/view?usp=sharing
lec.5
https://drive.google.com/file/d/16QbwF9lWwECRkPvM7B2vRGi5sa_TwiY3/view?usp=sharing
lec.6
https://drive.google.com/file/d/1y2MN_5NPhadkvkJvW4zNdkVEGn0wj9RI/view?usp=sharing
lec.7
https://drive.google.com/file/d/17iVC0H5pnLjE7r20zy6VEqipztTMYsea/view?usp=sharing