My code is giving error

i replicated the code of video , but still getting error, and i am not able to counter the error,
link : https://colab.research.google.com/drive/1D0S254RUkfaqQwiEFebyon_5jzCH4cRi?usp=sharing

Hey @saksham_thukral, please check the spelling of optimizers once. Once that cell runs, the last cell would also work.

Hope this helps.