4. Below is a reduced target population. Reported Taxable Income (Thousands in $) Taxpayer T1 T2 T3 T4 42 61 37 78 a. How many different samples of size n=3 can be selected by sampling with equal probability without replacement from this reduced target population of size N=4? b. Construct a sampling distribution of the sample mean (create a table). C. Plot a frequency distribution of the sampling distribution of the sample mean. d. State the (shortcut) formula for the Var[y] and compute. e. State the (shortcut) formula for the estimator of Var[y]. f. State the expression for the finite population correction factor.