How many milliliters must be added to completely precipitate the lead?

Lead ions can be precipitated from aqueous solutions by the addition of aqueous iodide: Lead iodide is virtually insolube in water so that the reaction appears to go to completion. How many milliliters of 3.550 M HI must be added to a solution containing 0.700 mol of Pb(NO3)2 to completely precipitate the lead?