i need help to do this requiremnet as ERD

if i have

the conference is identified by the year (unique) and described by city, location, chairman, an organizing committee, a set of participants, and a set of papers (articles). It is required to keep track of the total number of participants and papers for each conference occurrence.
and
participant is identified by a number (unique), and described by a name, category (distinguished lecturer, chairman, member of an organizing committee, author... etc.) and E-mail address. A participant in any conference occurrence may pay certain fees which is determined according to his/her category. It is required to keep track of the total fees for each particular conference occurrence

i need help to make this requiremnt as ERD

Very good. It seems that you understand the problem fairly well.

What have you done so far? How would you like us to help you?

-PatP