There are 28 pupils in Peter's class. He carried out a survey of how the pupils in his class travelled to school. His results are shown in the table below. Method of travel Number of pupils Bus 12 2 Car Bicycle S Walking The data are to be illustrated by a pie chart.

(a) Calculate, to the nearest degree, the sector angles of the pie chart.

(b) Draw the pie chart using a circle of radius 5 cm, labelling each sector with the method. of travel it represents. There are 34 pupils in Shumilla's class. For these pupils she carried out the same kind of survey and drew a pie chart to show her results.

(c) Calculate, giving your answer to three significant figures, the radius of a comparable pie chart which could be used to represent the results of Shumilla's survey.