Consider the following time series. Period 1 2 3 4 5 6 7 8 Demand 17 20 18 12 14 17 11 a) Using a trend projection, forecast the demand for Period 9. b) Calculate the MAD for this forecast. a) The forecasted demand for Period 9 is (Type an integer or decimal rounded to one decimal place as needed.) b) MAD = (Type an integer or decimal rounded to two decimal places as needed.)The following data represent the end-of-month stock price of a company rounded to the nearest dollar from June to December. Date Price June $25 July $37 August $41 September $50 October $49 November $47 December $55 What is the trend projection slope for these data? Round to four decimal places. O A. 4.2143 O B. 6.0952 O C. - 1.3555 O D. -2.3903