please help me. please provide the calculation

1. The following table gives the frequency distribution of waiting time (in minutes) during flight delays by 40 flights at Kuching International Airport (KIA) in a particular week. Waiting time (in minutes) Number of flights 10 - 20 8 20 - 30 5 30 - 40 12 40 - 50 10 50 - 60 3 60 - 70 2 (a) Draw a 'less than' ogive for the above data. (b) Estimate the median from the 'less than' ogive in (a). Hence, interpret the value obtained. (c) Calculate the mean and standard deviation. (d) Determine the shape of data distribution by calculating the Pearson coefficient of skewness. (e) It is reported that the average and standard deviation of waiting time during flight delays at Kota Kinabalu International Airport (KKIA) are 32 minutes and 10 minutes, respectively. Determine which airport is less consistent in waiting time during flight delays. 2. The following table shows the number of computer terminals produced by the Alif Corporation company for a sample of 30 days. Number of computer terminals Number of days 20 - 24 25 - 29 LA 30 - 34 9 35 - 39 40 - 44 6 (a) Calculate the mean and standard deviation for the above data. (b) Draw a 'less than' ogive. (c) From the 'less than' ogive, estimate the median value and interpret the value. (d) The mean and variance of the number of computer terminals produced by Adam Corporation are 40 and 35, respectively. Using an appropriate measure, determine which company shows a more dispersed production