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?

A 14.65

B 23.33

C 0.014

D 0.03

E 6.45

F 4.33

G 10.31