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Kindly reply with correct answers and step by step working.mention clearly about the formula and conversion.do not skip steps.

Q3

The following table shows the number of computer terminals produced by the Alif Corporation company for a sample of 30 days. Number of computer terminals Number of days 20 - 24 7 25 - 29 30 - 34 9 35 - 39 40 - 44 a) Calculate the mean and standard deviation for the above data. (5 marks) b) Draw a 'less than' ogive. (4 marks) c) From the 'less than' ogive, estimate the median value and interpret the value. (3 marks) d) The mean and variance of the number of computer terminals produced by Adam Corporation are 40 and 35, respectively. Using an appropriate measure, determine which company shows a more dispersed production