add solution of questions which are missing

[burninghell2002]

Add solution to questions which are missing or which you think might help to the community.

[ShrutiAgrawal131]

I want to contribute

[gritika18]

I would like to contribute

[divy-arpit]

I would like to contribute to the repo with a few machine learning models.

[superv13]

i would like to contribute

[prahuljose]

i would like to contribute @burninghell2002

[burninghell2002]

go ahead @prahuljose

[shimmer12]

I would like to contribute @burninghell2002