A certain mortgage pool has $900 million in par value. The senior ("A") tranche has 25% credit support, and the next level ("B") has 15% credit support. How much par value will be lost by each tranche when 30% of the underlying pool par value defaults? Excel Link: Excel Sheet.xlsx 30% pool defaults will cause no loss of par to either A or B tranches 30% pool defaults will wipe out B tranche completely and cause A tranche to lose nothing 30% pool defaults will wipe out B tranche completely and cause A tranche to lose 5% of $900 million, or $45 million 30% pool defaults will wipe out B tranche completely and cause A tranche to lose 10% of $900 million, or $90 million