(a) In a class of 30 girls, 17 play football, 12 play hockey and 4 play both games.
Draw a Venn diagram to illustrate the given information
How many girls play:
(α) one or two of the games;
(β) none of the two games?

b. *insert image*
In the diagram, ABCD is a circle of radius 14 cm and centre O. Line BO is perpendicular to line AC. Calculate, the total area of the shaded portions.