12a). Evaluate the following summation: (2 Marks) 7 Σ 42 1-3 12b). Write the following in summation notation: (3 Marks)

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12a). Evaluate the following summation: (2 Marks) 7 Σ 42 1-3 12b). Write the following in summation notation: (3 Marks) 1 2.3 4 5 6 + + += + + 8 16 32 64 12c) Construct your own example that demonstrates why the measures of central tendency can be misleading; thus measures of variability of data are more important. (3 Marks)