1. Moisture test (unit %) of a sample of some product A in stock has the following results: The moisture of product A (%) 4.6 4.8 5.0 5.2 5.4 Quantity 11 16 17 21 16 a. With 95% confidence, estimate the number of product A in a warehouse with a minimum moisture content of 5.2% knowing that there are 10,000 products of A in stock. b. At the 5% level of significance, can it be assumed that the variance of the moisture content of all these products in stock is less than 0.09(% squared)? Assume that the moisture content of product A in stock has normal distribution. 2. Collect data on the number of new Covid 19 cases for at least 36 consecutive days in a country in the world. a. With 95% confidence, estimate the average number of new Covid-19 cases per day for that country based on the data obtained. b. Based on the collected data and the above estimation results, evaluate and compare the Covid 19 epidemic situation of the selected country with other countries in the same region