a)Explain the approach to mixed methods that a researcher might use if they want to design a questionnaire. Outline how the approach will assist in designing a questionnaire. (8 marks)

(you need to explain the approaches and outline how it help in designing the questionnaire)

b)Explain the purpose of a control group in experimental research. (8 marks)

Please don't copy other CHEGG ANSWERS because they are not answered according to the question. please answer according to question and marks including reference . and thanks in advance