Writer:
screenplays, novels, musicals,opera, full length and one-act plays and skits suitable for television productions.
Composer:
musical compositions are opera, classical orchestrations, pop, jazz, blues, hip-hop, Latin, country, gospel and folk songs. Also choral music in all categories.
Singer:
Pop, classical, jazz, blues, gospel, etc. read music and some piano. Singles on jango.com.