3a)A rowing club has 20 members. The coachwants to find out about how many hoursmembers spend in the gym per week. Hedecides to take systematic sample of 10members for his research. Each person iswritten in a list in order of how long they havebeen a member of the club. Given that the firstitem in the data is person numberon the list,determine the reference number of the othermembers in the sample and state thereference number of the fourth person the list.Use the table below for guidance16.11162712178.131849.1419101520b)Consider a finite population of size N=5 withvalues 1,2,3,4,5Determine the estimate of the variance of thesample mean

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3a)A rowing club has 20 members. The coach wants to find out about how many hours members spend in the gym per week. He decides to take systematic sample of 10 members for his research. Each person is written in a list in order of how long they have been a member of the club. Given that the first item in the data is person number 2, on the list, determine the reference number of the other members in the sample and state the reference number of the fourth person the list. Use the table below for guidance 1 6. 11 16 2 7 12 17 8 13 18 4 9 14 19 10 15 20