How would the political system respond?

Disaster has struck the Canadian political system! The Prime Minister, the Leader of the Opposition and the Governor General have been assassinated by a terrorist organization (you may alter this scenario to have these office holders resign simultaneously because of a political scandal). What would happen in the aftermath of such an event? What would parliament do? How would the political system respond? Would the federal government collapse? Write a 1500-word Briefing note to cabinet.? You are assuming the role of the following actor while writing this piece: The Clerk of the Privy Council References must be used to support your analysis; therefore, a proper bibliography and referencing format is required.