An quarterly time series on net sales (in billions of dollars) contains 22 values, from quarter 1 of 2012 (t=1) to quarter 2 of 2017 (t=22) . The tted trendline for the data has the following equation: Tt = 4.6 + 0.1 t Assume a multiplicative model, the seasonal indexes are calculated as below: 1" quarter 2"\" quarter 3\" quarter 4'11 quarter Please answer the questions a and b below. (3 a. lntepret the value of the rst quarter seasonal index 81. Select the correct answer below. {2:} A. On average, the sales for the 1st quarter are 5.2% of the trendline projection. {@1- B. The sales for the 1st quarter are 5.2% below the trendline projection, on average. {:1- C. On average, the sales for the 1st quarter are 5.2% above the trendline projection. D. The sales for the 1st quarter are estimated 5.2% below the trendline projection. b. What is the forecast sales for the third quarter of 2018? $|j billion (Simplify your answer to two decimal places.) The accompanying data represent the yearly amount of solar power installed (in megawatts) in a particular area from 2000 to 2008. The trend forecasting equations below were found, where t is the number of years after 1999. Complete parts (a) to (b) below. a, = - 34.6667 + 27.8000 t 0 > 0 > 0 12 0 12 0 12 Coded Year Coded Year Coded Year b. Calculate a linear trend forecasting equation and plot the trend line using X=O for 1999. 1.1 H x- I (Round to two decimal places as needed.) Choose the correct graph below. 1:) A. 1:) B. 1:) C. A A A 30 Q 30 Q 30 Q 2?, 0' 0' so? 0' w 15 w 15 w 15 \"\" a ' - D\" D\" t 0 0 0 0 12 0 12 0 12 Coded Year Coded Year Coded Year c. Calculate a quadratic trend forecasting equation and plot the results, using X=0 for 1999. \\?i=| (Round to four decimal places as needed.) +( Xi+(| X. 2 I Choose the correct graph below. 0 A. 30 A Price (3) E 0 12 Coded Year a Q l3. C) B. 30 Coded Year 12 9,9 C) c. 30 Price (3) E Coded Year 12 ,0'9 l3