Use Excel to answer the questions below. Formulate the null and alternative hypothesis. Present the answer in tabulated form and indicate the decision in the table. Follow the example of tabulated results in MS Word during the discussion. Please submit the processed Excel. 1. A researcher surveyed the stock price of 3 big companies from 2011 to 2020 and the results were as follows: Year 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 Using Cl = 0.05, is there a significant difference in the stock price Company A 205 228 247.2 260.6 251 256 320 265 328.6 380 Company B 55 88.9 90.45 102 173.1 215 219 194 253 291.8 among the three (3) companies? Company C 16.25 34.95 48 83.85 113.1 196 186 163.5 151 127 2. A certain IT company would like to determine if there is a significant difference in the average time for the staff assigned to solve 3 different computer-related problems. The data (in terms of minutes) are indicated below. Use Cl = 0.05. Problem 1; Problem 2: Problem 3: 20 35 42 20 52 40 32 25 22 68 46 57 39 45 50 39 18 38 49 63 76 39 29 46 42