This graphics by The New Paper shows the different ways two soccer stars scored their goals in key tournaments in 2014. Pie graphs are used. The size of the two pie graphs should be different because Ronaldo scored 52 and Messi 49 goals. The area of a pie graph represents the number of goals.

(a) By how many percent should the radius of Messi's pie graph be reduced to make the graph correct?

(b) Calculate the average (mean) number of goals scored per game by each player. Explain the significance of this value.

(c) Calculate the number of minutes played per goal for each player. Explain the significance of this value.

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