Number of Birds
Alana and Eva are sisters.Let X denote the number of birds that Alana may have in the next two years,and let Y denote the number of birds Eva may have during the same period.The marginal probability distributions of X and Y are shown below. 
-{Number of Birds Narrative} Compute the covariance between X and Y.
Definitions:
Future Values
The value of an asset or amount of money at a specified date in the future that is equivalent in value to a specified sum today.
Present Values
The process of determining the present worth of an amount or series of cash flows that will be received or paid in the future, using a specific discount rate.
Annuity Payment
A fixed sum of money paid to someone each period, typically for the rest of their life or for a fixed number of years.
Insurance Proceeds
The payment received by an insured party from an insurance company in the event of a claim.
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