c} A study was conducted at lvlelaka International Airport where a researcher handing out a questionnaire to travelers asking them to evaluate the airport's services. He does net ask travelers who are hurrying through the airport with their hands full of luggage. but instead asks all travelers who are waiting in the boarding hall and not taking naps while they wait. i. Suggest the best data collection method to be used in the above study. {1 mark) ii. Identify the sampling technique used in the above study and give ONE {1] disadvantage of using the sampling technique mentioned. {2 marks] iii. A questionnaire is to be designed for this survey. Suggest TWO [2} questions to measure the effectiveness of the services provided by the airport. each with the following scale of measurement: ordinal ll: ratio. [Your answer MUST NUT he a demographic question}. {2 marks)