There is a 11.4 m^3 propane (molecular weight 44) storage tank located 270m from the control room of your unit, and it has been brought up that a release and vapor cloud explosion might threaten the control room (rated to withstand a maximum side on over pressure of 2.7 psi). What would be the probability that someone caught outside near the control room would be injured fatally from impact by consequence of the explosion? Make any other reasonable assumptions as required. The density of liquid propane is 487 kg/m^3.