In a garden, the number of seedlings for each meter of a bed are as follows: Number Number of Number Number of seedlings seedlings 8 26 6 6 23 25 1 2 3 4 5 6 7 8 9 10 16 28 21 22 18 11 n 12 134 15 16 17 18 19 20 28 11 16 7 22 44 26 31 26 (a) If the second number of seedlings is the first choice, use systematic sampling with k = 4 to select a sample from this population. (b) Use the selected seedlings to estimate the mean for the population. (c) Find the estimated variance for the estimator in (b).