c) A researcher has extracted two samples from the same target population, sample A and sample B. Sample A has a mean of 25 kg while sample B has a mean twice that of sample A. Sample size of sample A is three times more than that of sample B. Sum of sample sizes is 60. Calculate:
i. Mean of sample B (1mark)
ii. Sample size of sample A and sample B (2 marks)
iii. Summation of x variables for sample A and sample B (4 marks)
iv. Standard deviation of sample A and sample B, consider ungrouped data (5 marks)