Q3. Thirty-one people completed a jigsaw in the following times (in minutes). 11 44 72 48 48 49 39 87 73 23 120 24 61 36 66 67 86 79 65 47 36 133 78 81 70 75 53 42 42 72 144 a) Construct a stem and leaf diagram. b) Identify any outliers by using the values of the quartiles and illustrating your results on a boxplot.Q4. These are the times of the postal delivery to my house over four successive weeks. 9:01 9:02 9:30 9:19 9:15 9:29 9:45 9:53 9:02 9:05 9:31 9:47 9:17 9:48 9:29 9:09 9:29 9:02 9:10 9:12 9:25 9:10 9:13 9:19 a) Draw a stem and leaf diagram. b) Find the median time. c) Find the quartiles. d) Draw a box plot. Comment on any skewness