Need help with these question don't understand pls help

During which of the following phases of the business cycle does the real gdp fall? a. trough b. expansion c. contraction d. peak

Amanager of a store that sells and installs spas wants to prepare a forecast for january and june of next year. her forecasts are a combination of trend and seasonality. she uses the following equation to estimate the trend component of monthly demand: ft = 30+5t, where t = 1 in january of this year. seasonal relatives are 0.60 for january and 1.50 for june. what demands should she predict for january and june of next year

Atariff on avocadoes the price of avocadoes, consumers' surplus for avocado buyers, producers' surplus of avocado growers and tariff revenue. because the loss to is more than the gain to there is a net loss to society. raises; decreases; increases; generates; consumers; producers and government raises; increases; decreases; does not generate; producers and government; consumers lowers; increases; decreases; does not generate; producers and government; consumers raises; increases; decreases; generates; producers; consumers and government