39. (a)

12	8	6	1	0
11	9	5	2	0
11	8	5	3	0

(b)

3	3	3	20	0
3	3	3	19	0
3	3	3	18	0
3	3	3	17	0
3	3	3	16	0
3	3	3	15	0

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