QUESTION 1 COVID-19 virus has been categorized as a pandemic in March 2020 by the World Health Organization (WHO). A study was conducted through an online survey to describe the impact of the COVID-19 pandemic on the monthly spending on health supplement. A random sample of 11 respondents participated in the survey and the result is shown below: Table 1 Respondent Age Before Pandemic During pandemic (RM) [RM) 24 12 35 35 13 40 27 B 23 23 15 15 20 45 45 72 24 30 100 100 9 29 80 85 10 42 75 11 50 50 Answer the following questions without using any output from any software. a) Calculate the mean monthly spending different before and during COVID-19 pandemic. bj Calculate the standard deviation monthly spending different before and during COVID-19 pandemic. c) At