Sales of tablet computers at Marika Gonzalez's electronics store in Washington, D.C., over the past 10 weeks are shown in the table below:

Week	1	2	3	4	5	6	7	8	9	10
Demand	2020	2121	2828	3636	2626	2929	3535	2020	2424	2929

a) The forecast for weeks 2 through 10 using exponential smoothing with alpha

=0.55 and a week 1 initial forecast of 20.0 are (round your responses to two decimal places):

Week	1	2	3	4	5	6	7	8	9	10
Demand	2020	2121	2828	3636	2626	2929	3535	2020	2424	2929
Forecast	20.020.0	20.020.0	20.5520.55	24.6524.65	30.8930.89	28.2028.20	28.6428.64	32.1432.14	25.4625.46	24.6624.66

b) For the forecast developed using exponential smoothing

(alpha =0.55 and initial forecast 20.0), the MAD = enter your response here sales (round your response to two decimal places).

C) For the forecast developed using, an exponential smoother name (alpha =0.55 and initial forecast 20.0) the tracking signal=