A bar chart and a pie chart

Forty students named their favourite subject. You will find the total, the angle of each pie slice and the order of the bars. Then the program draws the bar chart and the pie chart side by side.

The idea. A slice's angle is $\dfrac{\text{count}}{\text{total}} \times 360^\circ$. Bars are easiest to read from the tallest to the shortest.

Your tasks.

1. Set total to the sum of counts.
2. Set angles to the list of slice angles, one for each count.
3. Set order to the subjects sorted from the largest count to the smallest.