a	0.2		Winter's Method
b	0.1
c	0.05
Period	Actual (Dt)	St	Lt	Tt	Forecast Ft
0			123.5	57.3
1	65	0.2	213.8	60.6	34.0
2	201	d	288.6	62.0	159.5
3	626	1.8	e	61.9	634.8
4	491	1.4	398.4	60.6	584.5
5	83	0.2	452.9	60.0	89.0
6	248	f	494.8	58.2	301.1
7	769	1.8	527.3	55.6	1000.6
8	567	1.4	546.8	52.0	822.4
9		0.2			115.7
10		0.6			g
11
12

Suppose seasonality and trend adjusted exponential smoothing(winter's method)is used to forecast demand with periodicity p=4

Provide the missing values d, e , f and g assuming smoothing coefficients are a= 0.2, b=0.1 and c=0.05. Show your work