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The amount of money contributed by a group of students during a fundraising for a needy student was as shown in the table below.
a. On the grid provided, draw an ogive to represent the data. (4 marks)
b. Use the graph to estimate:
i. the median; (1 mark)
ii. The quartile deviation; (3 marks)
iii. The percentage number of students who contributed at least Ksh 750.50. (2 marks)