You have liabilities to pay of 100 in 1 year, 150 in 2 years, and 200 in 3 years. You have 3 par value bonds that you can buy that make yearly coupon payments: Bond A - 1 year, 5% coupon rate Bond B - 2 year, 7% coupon rate Bond C - 3 year, 3% coupon rate How much of Bond A must you buy to exactly match these liabilities?