Coal shipments from a mine for the past 18 weeks are: Tonnes Week Shipped 123456789 405 410 420 415 412 420 424 433 438 10 440 11 446 12 451 13 455 14 464 15 466 16 474 17 476 18 482 a-1. Select the correct chart showing plotted data as time series. Chart A y = 4.5934x + 396.97 Chart B 490 y=4.333x+398.1 480 480 470 460 450 440 430 Tonnes Shipped 470 460 450 440 430 420 420 410 410 400 400 1 3 5 7 9 11 13 15 17 1 3 5 7 9 11 Weeks 13 15 (Click to select) a-2. Determine the pattern and explain why an averaging technique would not be appropriate in this case. There is a (Click to select) trend in the data. The averaging technique forecasts will consistently (Click to select) the data. b. Use an appropriate technique to develop a forecast for week 19. (Round the final answer to 2 decimal places.) Forecast for week 19 Chart C y=4.585x+395.7 480 470 Tonnes Shipped 460 450 440 430 420 410 400 17 17 1 3 5 7 9 Weeks 11