Below you are given the first four values of a time series. 
Using a four-period moving average, the forecasted value for period 5 is
Definitions:
Lucent Technologies
A former telecommunications company that was once a part of AT&T before being spun off and eventually merged with Alcatel SA to create Alcatel-Lucent.
Exxon
A multinational oil and gas corporation that is one of the world's largest publicly traded energy providers and chemical manufacturers.
Treasury Bond
Long-term, government-issued debt securities with a fixed interest rate, considered low-risk investments.
Ford
An American multinational automaker known for its production and sale of cars, trucks, and commercial vehicles.
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