A florist determines the probabilities for the number of flower arrangements they deliver each Type numbers in the boxes. by Part 1: 4 points day. by Part 2: 4 points by Part 3:2 points ab Part 4: 2 points 12 points 19 20 21 22 23 P(x) 0.21 0.24 0.31 0.11 0.13 Find the mean, variance, and standard deviation of the distribution rounded to 4 decimal places. Mean = Variance = Standard Deviation = Approximately how many arrangements should the florist expect to deliver each week, rounded to the nearest whole number