Answer:
a)It is Daniel
2.Smoking drugs,he behave in a strange way such as to steal from other people's products like cellphones
3)He is walking in a strange way
☆He doesn't wash his body
☆He smell drugs
3b)I can help him by sending him to the helping centre of drugs&alcohol addiction people to get help and give him advices for changing his life to be the better person than he was.