which method of sampling and method of data collection would choose to collect data for the following statistical analyses and reason behind the selection of this method.

1. The association of bankers of Australia would like to investigate the Australian bank's strategic plan for the financial year 2021/2021 to overcome the slump of banks revenue due to the Covid 19 pandemic.

2. The management of Holmes institute would like to examine the difficulties faced by students during Covid 19 pandemic.

3. World health organization would like to assess the relationship between Covid 19 mortality and age.

4. Victorian Premier would like to know the no of employees sacked during the Covid 19 pandemic.

5. Queensland police would like to know the peoples experience driving on a newly opened highway between metro and regional Queensland.