please help this statistics questions with clear and details steps and explaination, thank you very much

Question 2 {20 marks} Checking of the quality of tea bag lling machine is performed regularly. In a sample of 12 tea bags produced. the weight (grams) of tea leaf in an individual tea bag is recorded as follow: The production cost of a tea bag is calculated based on the following: i. a xed cost of $0.3 each tea bag ii. a variable cost of $0.1 per gram of tea leaf in the tea bag (:1) Find the sample mean. sample standard deviation and sample variance of the weight of tea leaf in a tea bag. (b) Find the lL'r'J1 percentile and 90':'1 percentile of the weight of tea leaf in a tea bag. (c) Find the sample mem sample standard deviation, 10\"I percentile, and the range of the production cost of a tea bag. ((1) It is discussed, during the management meeting, about controlling the production cost of tea bags. Prepare a simple summary report (in around 30 - 50 words) about the production cost of a tea bag. (The summary report needs to include all summary statistics found in part (c))