The science faculty of a public university recorded data on the number of students enrolled in the different study majors for the years 2016 and 2017. These data are useful for the future planning of the faculty. Please see the excel sheet attached.
a) Use an appropriate graphical technique or chart to display the percentage value of the number of enrolments of the different study major in 2017. Display the chart.
b) Use an appropriate graphical technique or chart to compare the number of enrolment in 2016 and 2017 of the different study major. Display the chart.