Help with the time series question below

Question 17 Which of the following time series has a more dominant cyclical component? Group of answer choices Monthly Sales of a particular brand of toothpaste at TARGET Monthly sales of a gallon of milk at Albertsons Monthly average sales of a pound of ground coffee at Starbucks Monthly sales of single family homes in Orange County Question 18 Which of the following statements is true about a monthly time series which satisfies the additive model? Group of answer choices Its seasonal indexes must add up to 12 Its seasonal indexes must add up to 0 A seasonal index of 1.1, say for April, means that April's value is 10% more than the average monthly value for the year Its seasonal indexes must add up to 31 Question 19 Suppose that an expert in the auto industry thinks that the annual light truck US production for the year 2007 is 5 million. The same expert also projects the third quarter of 2007 to have a production of 3 million. Also suppose that the seasonal index in quarter 4 is a quarter of the seasonal index in quarter 3. Using the above information, what is the reasonable projection for the fourth quarter of 2007? 3 million 1.5 million 4.5 million 2.25 million 0.75 million Question 20 By using contra-seasonal promotions, a supplier of a seasonal product that has a multiplicative seasonality) Seeks to reduce its exposure to the business cycle Seeks to aggressively promote its product when the seasonal index is much lower than 0 Seeks to reduce the seasonal troughs in the demand for its product Seeks to aggressively promote its product when the seasonal index is much higher than 1