Use the table for the question(s)below.
Consider the following covariances between securities: 
-What is the variance on a portfolio that has $3000 invested in Duke Energy,$4000 invested in Microsoft,and $3000 invested in Wal-Mart stock?
Definitions:
Nonobliterative Otosclerosis
Nonobliterative Otosclerosis is a form of otosclerosis that affects the inner ear without fully closing (obliterating) the ear canal, often leading to progressive hearing loss.
Oval Window
A membrane-covered opening that leads from the middle ear to the vestibule of the inner ear, playing a key role in the process of hearing.
Left Ear
The external and internal auditory components located on the left side of the head, responsible for receiving and interpreting sound.
Cholesteatoma
An abnormal skin growth in the middle ear behind the eardrum that can cause damage and lead to hearing loss.
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