3. Complete each of the following: (a) A company has decided to use bonds to make a payment of $50,000 that is due in nine years. There are currently three bonds in the market that are suitable for this purpose, Bond I which is a three-year 7% coupon bond with a face value of $1000 and a current price of $925, Bond 2 which is a seven-year pure discount bond issued nine months ago with a present value of $1500 and Bond 3 which is a fourteen-year pure discount bond issued two years ago with a face value of $2500. Given that the yield to maturity in the bond market is 10%, determine: (0) a portfolio strategy that will allow the company to immunize the liability. I [5 marks) the number of units the company should buy in each bond. [3 marks)