Today is 1 July 2020. Joan has a portfolio which consists of two different types of financial instruments Chenceforth referred to as instrument A and instrument Joan purchased all instruments ontMy2012 to create this portfolio and this portfolio is composed of 35 units of instrument A and 3 units of instrument B. . Instrument Air-coupon bond with a face value of 100. This bond matures at par. The maturity date is 1 uary 2010 Instrument is a Treasury bond with a coupon rate of) 4.31% pa and face value of 100. This bond matures at par. The maturity date is 1 january 2023 (d) Based on the price in parts and part b. and the duration value in parte calculate the current duration of Joan's portfolio Express your answer in terms of years and round your answer to the decimal places Today is 1 July 2020. Joan has a portfolio which consists of two different types of financial instruments Chenceforth referred to as instrument A and instrument Joan purchased all instruments ontMy2012 to create this portfolio and this portfolio is composed of 35 units of instrument A and 3 units of instrument B. . Instrument Air-coupon bond with a face value of 100. This bond matures at par. The maturity date is 1 uary 2010 Instrument is a Treasury bond with a coupon rate of) 4.31% pa and face value of 100. This bond matures at par. The maturity date is 1 january 2023 (d) Based on the price in parts and part b. and the duration value in parte calculate the current duration of Joan's portfolio Express your answer in terms of years and round your answer to the decimal places