Based on a company's balance sheet, the asset includes: A1 with value of $3 million and duration of 2years A2 with value of $2 million and duration of 6 years A3 with value of $1 million and duration of 8 years The liability includes: L1 with value of $4 million and duration of 20 years L2 with value of $2 million and duration of 30 years What is the duration of the company's asset portfolio in years? 4.33 6.45 0.03 23.33 0.014 14.65 10.31