'This' is a determiner.
no
yes, an is a determiner. it fall under the the definite and indefinite article
no
Yes, the Australian slang term 'No worries.' is made up of a determiner and a noun.
Pronoun, verb, determiner, adjective, noun, preposition, determiner, noun, preposition, determiner, noun
Yes
yes
yes
article or determiner
Another is a determiner.
determiner