Ad Manager takes into account 28 days of historical data when running forecasts. Today is Monday. Which of the following accurately describes how the system forecasts what it believes will serve to a publisher’s homepage ad unit next Monday.

Ad Manager looks back to the 2nd Monday in the system and assumes that next Monday will have the same traffic for the publisher’s homepage ad unit.
Ad Manager looks back to the 1st Monday in the sample file and assumes that next Monday will have the same traffic for the publisher’s homepage ad unit.
Ad Manager does trend analysis from the last four weeks to try to estimate how many impressions you’ll receive next Monday on the publisher’s homepage ad unit.
None of the above
Ad Manager takes a flat average of all of the past 4 Mondays and assumes every Monday from now on will have that average number of impressions, including next Monday, for the publisher’s homepage ad unit.