Question $2$: Sampling $(5$ marks, $30$ minutes$)$a total of $100,000$ customers. Among them,$50\%$ with income of $$35,000-60,000,$ and $20\%$ with income higher than $$50,000.$a$)(1\mathrm{.}5$ marks$)$ The bank president asks you $($a researcher$)$ to conduct a survey among customers on their satisfaction with online banking, with a sample size for the survey of $1,000$ customers. Explain the cluster sampling method and its advantages and disadvantages.Note: your answer must refer to the key words$/$concepts we discussed in class. Do not include key words$/$concepts that we did not cover in class.b$)(1\mathrm{.}5$ marks$)$ The president asks you to conduct $100$ interviews among customers on their satisfaction with online banking. Explain the quota sampling method, and its advantages and disadvantages.Note: your answer must refer to the key words$/$concepts we discussed in class. Do not include key words$/$concepts that we did not cover in class.c$)(2$ marks$)$ Discuss why managers at Canadian Bank Inc. need to have awareness of sampling designs and sample size decisions. Note: your answer must refer to the key words$/$concepts we discussed in class. Do not include key words$/$concepts that we did not cover in class.U v$<<+$ v