If the dates when the students joined are given as below. Draw a bar plot to plot date on x axis and marks on y axis. x = [datetime.datetime(2011, 12, 1, 10, 0), datetime.datetime(2011, 1, 4, 9, 0), datetime.datetime(2011, 5, 5, 9, 0), datetime.datetime(2011, 6, 5, 9, 0), datetime.datetime(2011, 5, 6, 9, 0)