According to the 2013–2014 edition of The World Factbook, the number of followers of the world’s four largest religions was 2.2 billion for Christianity, 1.6 billion for Islam, 1.0 billion for Hinduism, and 0.5 billion for Buddhism.

(a) Construct a relative frequency distribution.

(b) Sketch a bar graph.

(c) Can you find a mean, median, or mode for these data?
If so, do so and interpret.