The following numbers are observations on tensile strength of synthetic fabric specimens selected from a production process at equally spaced time intervals. Construct appropriate control charts, and comment (assume an assignable cause is identifiable for any out-of-control observations) 1.

51.3 51.7 49.512.

49.6 48.4 50.02.

51.0 50.0 49.313.

49.8 51.2 49.73.

50.8 51.1 49.014.

50.4 49.9 50.74.

50.6 51.1 49.015.

49.4 49.5 49.05.

49.6 50.5 50.916.

50.7 49.0 50.06.

51.3 52.0 50.317.

50.8 49.5 50.97.

49.7 50.5 50.318.

48.5 50.3 49.38.

51.8 50.3 50.019.

49.6 50.6 49.49.

48.6 50.5 50.720.

50.9 49.4 49.710.

49.6 49.8 50.521.

54.1 49.8 48.511.

49.9 50.7 49.22.

50.2 49.6 51.5