A researcher studies job productivity of workers who work from home compared to those who work at office during pandemic Covid-19 in a multinational corporation. A set of key performance indicators (KPIs) has been set and used in this evaluation purpose. A summative score will be given to each staff based on his/her performance in those indicators. A sample size of 100 staff from various departments in the corporation are to be randomly selected in this research. (i) Recommend an appropriate sampling technique for the researcher to select the samples required. Justify your answer given. (ii) Describe how the sample staff is determined using the sampling technique recommended in part (i). (iii) Recommend a quantitative variable and a qualitative variable that are required by the researcher to meet the objective of the survey. Justified your answers given. (iv) Recommend TWO appropriate descriptive statistical tools to summarize raw data for EACH of the two variables recommded in part (iii)