Q Estion A] A researcher wanted to estimate the average amount of pocket money received by teenagers each week in Hong Kong. From each district in Hong Kong, 100 teenagers were randomly selected and asked to ll in a questionnaire on a website. The average amount of pocket money received by the selected teenagers per week was HKD450. Below are 4 of the questions asked in the questionnaire. (1) What is the amount (in HK$) of pocket money you received each week? (2) Do you think the amount of pocket money is enough? (not enough I just right 1" more than enough) (3) What is your biggest expense? (Lunch t Toys t Books I Other) (4) How many times have you borrowed money 'om your 'iends last month? (a) What was the population in this study? (2 marks) (b) Which sampling technique was used? (2 marks) (c) Which data collection method was used? (2 marks) (d) Determine if the study is observational or experimental. (2 marks) (e) Determine if the statement \"It was found that the average age of the sea'ected teenagers In the sample was I45 years.\" is using descriptive statistics or inferential statistics. (2 marks) (t) For the variables corresponding to the 4 questions in the questionnaire, determine the types of the variables (qualitative, quantitative (discrete) or quantitative (continuous)) and their levels of measurement. (4 marks)