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 Walmart stock?
Definitions:
Cash Operating
Refers to the activities that involve the cash inflows and outflows from a company's primary business operations.
Salvage Value
The anticipated amount an asset is expected to yield when it is sold after its lifespan has concluded.
Depreciation
The process of allocating the cost of a tangible asset over its useful life, reflecting the decrease in value over time.
Useful Life
The estimated time period that an asset is expected to be usable for its intended purpose, affecting its depreciation or amortization schedules.
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