Which of the following descriptions regarding a box-and-whiskers plot is NOT correct? The black solid line inside the box is the median. The lower hinge represents the number below which 25 percent of the numbers fall. Data points outside the whiskers are outliers. The upper whisker boundary is the maximum value of the data. Question 3 (Mandatory) (2 points) Which of the following descriptions regarding hist() in Ris correct? 'xlab' is used in the plot function to add both x-axis and y-axis labels. O 'title' is used in the plot function to add the title. 'xlim' is used to control the range of the x-axis. hist) can only generate a frequency plot, but not a density plot. Question 4 (Mandatory) (2 points) Which of the following descriptions regarding scatter plot matrix is NOT correct? The names of the variables are in the cells of the main diagonal. Each off-diagonal cell shows the scatter plot between corresponding variables. The scatter plot matrix can be applied to discrete (opposite of continuous) variables. The scatter plot in row 2 and column 3 is identical to the one in row 3 and column 2 Question 5 (Mandatory) (2 points) Which of the following is the minimally required components of geplot2 graphics? data, esthetic mappings, and a geometric object data and esthetic mappings data and a geometric object esthetic mappings, and a geometric object