In this week's edition of Business News Background, head of content Mark Pownall and journalist Dan Wilkie discuss with host James Lush the top stories of the week, including Sirius Resource's $189 million capital raising, the Synergy board shake-up, height limits in Cottesloe, the state of Perth's residential real estate market, focusing on apartments and medium density housing, and a look at the burgeoning graphite sector in WA.