This is the assignments by using R-studio.

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Coffee_prices_2013.txt
price time month day year
149.3999939 1 01 02 13
146.5 2 01 03 13
147.3499908 3 01 04 13
150.3999939 4 01 07 13
148.1499939 5 01 08 13
147.8999939 6 01 09 13
149.6499939 7 01 10 13
153.3499908 8 01 11 13
153.3000031 9 01 14 13
152.5 10 01 15 13
153 11 01 16 13
155.5 12 01 17 13
156.3000031 13 01 18 13
148.5999908 14 01 22 13
150.3999939 15 01 23 13
146.5500031 16 01 24 13
148.3000031 17 01 25 13
149 18 01 28 13
149.8000031 19 01 29 13
147.6999969 20 01 30 13
146.9499969 21 01 31 13
147.9499969 22 02 01 13
144.3499908 23 02 04 13
144.0500031 24 02 05 13
142.0999908 25 02 06 13
140.3000031 26 02 07 13
141.0500031 27 02 08 13
140.1499939 28 02 11 13
140.6499939 29 02 12 13
138.75 30 02 13 13
138 31 02 14 13
136.9499969 32 02 15 13
136.5 33 02 19 13
141 34 02 20 13
141.75 35 02 21 13
143.0999908 36 02 22 13
142.5999908 37 02 25 13
142.8999939 38 02 26 13
142.3999939 39 02 27 13
142.6499939 40 02 28 13
142.8999939 41 03 01 13
145.9499969 42 03 04 13
140.5 43 03 05 13
140.5999908 44 03 06 13
142.4499969 45 03 07 13
143.3499908 46 03 08 13
143.0500031 47 03 11 13
141.6499939 48 03 12 13
140.0500031 49 03 13 13
138.8999939 50 03 14 13
136.5 51 03 15 13
133.1499939 52 03 18 13
133.0999908 53 03 19 13
133.5999908 54 03 20 13
133.75 55 03 21 13
135.3000031 56 03 22 13
135.5999908 57 03 25 13
137.5999908 58 03 26 13
136.5999908 59 03 27 13
137.1499939 60 03 28 13
138.3999939 61 04 01 13
136.1499939 62 04 02 13
139.4499969 63 04 03 13
139.5 64 04 04 13
140.1499939 65 04 05 13
135.8999939 66 04 08 13
135.3999939 67 04 09 13
136.0500031 68 04 10 13
136.8000031 69 04 11 13
135.25 70 04 12 13
134.4499969 71 04 15 13
135.8499908 72 04 16 13
136.0999908 73 04 17 13