Provide an example in which that fact is not true for systematic random sampling.: (a) when selecting a sample of 6 from a population of 60 in which the first 20 people have some characteristic, these people are more likely to be selected. (b) when selecting a sample of 3 from a population of 31, the 31st member of the population will never be selected. (c) when selecting a sample of 5 from a population of 50, the 50th member of the population will never be selected. (d) when selecting a sample of 4 from a population of 40 in which every 4th person has some characteristic, these people are more likely to be selected.