How do you say paper in french?

Tous les samedis, paul comme caissier à la pizzeria. a. travaillent b. travaillé c. a travaillé d. travaillait

In this french correct ? i dont know if the person i am talking to is a female or male im assuming that wouldn't affect it but i kind of forget . i know all adjectives agree with the nouns that they modify. métier is masculine so i use the adjective bon and bon is masculine so i use un? is that how it works je pense un bon métier pour toi est un artiste ou un architecte. i think a good job for you is an artist or an architect

20pts can anyone me due tomorrow i beg you (￣人￣)