The Table F below shows the number of students who gained admission into three Nursing Training Schools from the years 2001 to 2003.
                                                Table F

Nursing Training School	Year 2001	Year 2002	Year 2003
A	40	60	50
B	50	40	40
C	60	30	40

(a) Represent the data in Table F with a compound bar graph, using the years as the base of the graph (x-axis) and a scale of 2 cm to 20 students on the vertical axis (y-axis).
(b) Calculate: (i) the number of students who gained admission into Nursing Training School A for the entire period; (ii) the number of students who gained admission into the three Nursing Training Schools in the year 2003; (iii) the difference in enrolment between students who gained admission into Nursing Training Schools  A and C for the entire period.
(c) Outline one major difference between a Simple bar chart and a compound bar chart.