Sir i am stuck for this question

The speed radar has captured the speed of 20 random vehicles on a highway as below: 109.47 | 115.75 | 61.25 [76.18 [ 70.11 70.26 90.64 61.59 81.69 93.42 76.24l 90.10 | 72.76 | 71.61 | 88.16 64.00 63.42 104.72 75.41 96.65 3. Construct the normal distribution of the data with :1, i 2, i 3 Sigma values. b. Use Megastat to find the probability for the speed to be more than 60Kmph c. Use Megastat to find the probability for the speed to be less than 120Krnph d. Use Megastat to find the probability for the speed to be between 80 and 140 Kmph 6. Use Megastat to find the speed of the bottom 5% of the drivers f. Use Megastat to find the speed of the top 15% of the drivers 3. Use Megastat to nd the speed of the middle 70% of the drivers h. If there were 2000 vehicles went past the radar, how many of them would have been less than 40 Kmph