adding session-4.ipynb to build submission
adding session-4.ipynb to build submission

padipadou/CADL,alvaroing12/CADL,pkmital/CADL,padipadou/CADL,goddoe/CADL,dariox2/CADL,niazangels/CADL,pkmital/CADL,dariox2/CADL,alvaroing12/CADL,goddoe/CADL,niazangels/CADL