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The figure below shows a circle inscribed in a semi-circle. Part of the figure is shaded and point 0 is the centre of the circle.
If the diameter of the semi-circle is 4m, what is the area of the shaded part? (Take π = 3.14)
A. 9.42 m2
B. 6.28 m2
C. 4.71 m2
D. 1.57 m2