Use the data from problem:

52.2 43.8 50.3 51.1 48.3 47.8 48.3 47.4 50.1 50.5 51.4 54.2 54.4 48.6 54.5 47.3 50.3 48.1 46.6 50.2 50.5 48.2 46.3 48.1 49.4 50.5 47.7 50.1 45.6 49.3 44.4 47.2 47.6 56.9 48.9 49.9 46.3 44.9 51.2 48.5 49.2 46.6 47.3 45.3 49.2 51.1 49.2 50.0 49.8 48.2 47.2 42.6 46.9 46.5 47.3 46.5 47.7 49.2 46.3 48.5 53.4 48.0 50.0 49.7 48.8 48.3 48.7 48.1 48.2 48.6 48.3 48.3 48.3 48.3 48.6 48.2 48.3 48.7 48.1 48.5

a. calculate the sample mean, sample median, sample variance, and sample standard deviation.
b. construct a stem and leaf plot, histogram, and box plot.