Can someone me on drawing er and use case diagram on following scenarios.

* develop a system to automate membership details and time allocation for swimmers in a swimming club. all users should take membership and pay monthly for usage. usage could be with a coach or without.

* part of the process of course registration at ousl for a new applicant

when an applicant requests to register for a course, an officer from student affairs verifies whether he/she has relevant entry qualifications and paid the fees. if certificates to show entry qualifications are not brought the applicant is asked to bring them and return. if the fees are not paid the applicant is directed to the finance division to make the payment and come. to register for a course, the system checks whether the course prerequisites are satisfied and let the student register for the particular course.
a student is given a student id number and a registration number for the particular programme. all courses have unique course codes, titles, credit ratings and a set of pre-requisites.