Coal shipments from a mine for the past 18 weeks are:

Coal shipments from a mine for the past 18 weeks are:

Week	Tonnes Shipped
1	494
2	487
3	479
4	471
5	467
6	460
7	455
8	451
9	445
10	441
11	438
12	434
13	429
14	422
15	417
16	413
17	409
18	405

a-1.Select the correct chart showing plotted data as time series.

Chart A	Chart B	Chart C

(Click to select) Chart A Chart B Chart C

a-2.Determine the pattern and explain why an averaging technique would not be appropriate in this case. There is a (Click to select) long-term downward long-term upward trend in the data. The averaging technique forecasts willconsistently (Click to select) overestimate underestimate 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