3. In order to eveluate four key board designs (A, B, C, D) by a manufacturer, the company asked a company secretary to use the key boards at different times and keep a record of the errors per page for all the word document prepared. The Table below conatins the number of errors per page for each design during the period of evaluation. Key Board A 8 9 5 7 Key Board B 10 11 14 16 19 17 10 Key Board C 5 0 1 Key Board D 15 20 25 28 23 25 22 Required: (a) Formulate a research question for the scenario [2 marks ] (b) Formulate the null and alternative hypotheses for the scenario [4 marks ] (d) Which of the four Key Board designs would you recommend for use and why? [8 marks]