Your company holds the following Assets and Liabilities:

Assets

$64 Yellow Assets with duration of 5.6

$36 Green Assets with duration of 1.6

$73 Blue Assets with duration of 7.2

Liabilities

$41 Purple Liabilities with duration of 4

$22 Red Liabilities with duration of 4.8

$17 Orange Liabilities with duration of 2

What is the duration of the companys liabilities?

(please show at least two decimal places)