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Concept the time series graph and give conclusions on it

Design these data as a time series using t = 1 to 72 for time.  describe what conclusions can I derive from this graph regarding trends and seasonality?

Period

Sales

1

22.26

2

24.42

3

27.06

4

27.14

5

29.43

6

29.56

7

27.33

8

27.13

9

23.88

10

26.88

11

25.31

12

23.66

13

24.68

14

25.31

15

29.86

16

31.13

17

33.39

18

31.04

19

31.48

20

32.00

21

32.08

22

28.15

23

26.06

24

26.08

25

26.85

26

26.20

27

29.33

28

31.59

29

34.19

30

33.24

31

32.44

32

32.73

33

39.46

34

31.61

35

27.28

36

33.27

37

23.54

38

27.09

39

32.86

40

34.25

41

34.04

42

36.39

43

35.65

44

36.14

45

33.37

46

31.58

47

28.69

48

29.83

49

25.01

50

26.02

51

32.41

52

36.55

53

37.34

54

32.55

55

38.88

56

32.62

57

34.97

58

30.02

59

26.78

60

30.79

61

27.30

62

29.90

63

35.55

64

44.84

65

31.38

66

36.80

67

38.88

68

34.89

69

41.42

70

34.54

71

30.26

72

33.29

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