Answer Happy

Can you please answer all these questions in details? Thanks inadvance Please answer both questions in details?
10. A bag contains 8 marbles. (a) How many ways could we select 5, without replacement, if the order matters. (b) How many ways could we select 5, without replacement, if the order doesn't matter. (c) How many ways could we select 5, with replacement, if the order matters. (d) How many ways could we select 5, with replacement, if the order doesn't matter. 11. Suppose that in the population, on a certain measurement, the mean is μ = 56.2 and the standard deviation is o = 8.1. Would it be considered unusual if a random sample of n = 81 had a sample mean of o = 60.3?