The following scores represent the final examination grade for an elementary statistics course: 23 60 79 32 57 74 52 70 82 36 80 77 81 95 41 65 92 85 55 76 52 10 64 75 78 25 80 98 81 67 41 71 83 54 64 72 88 62 74 4360 78 89 76 8448 84 9015 79 34 6717 82 69 74 63 80 85 61 (a) Construct a stemwandnleaf plot for the examination grades in which the stems are 1,2,3,....9. (b) Set up a relative frequency distribution. (c) Construct a relative frequency histogram, draw an estimate of the graph of the distribution and discuss the skewness of the distribution. (d) Compute the sample mean, sample median, and sampie standard deviation