Question $3.$ Assume that you are a CRM director in a financial company which serves only three products: checking$/$saving account $($CSA$),$ credit card $($CC$),$ and loan $($L$).$ The company has a total of $10,000$ unduplicated unique customers. Below is the table that summarizes the combinations of product mixes along with the information of the size, annual profit $($per customer$),$ and annual retention rate for each segment. Size $(\%)$ Annual Profit $($$$)$ Annual Retention Rate $(\%)$ CSA only $40\%$ $$10080\%$ CC only $10\%$ $$50060\%$ L only $5\%$ $$100060\%$ CSA $+$ CC $25\%$ $$150060\%$ CSA $+$ L $10\%$ $$250070\%$ CC $+$ L $5\%$ $$220080\%$ CSA $+$ CC $+$ L $5\%$ $$400090\%$ Using the information above, please identify the most and the least profitable segments and explain why they are the most or least profitable segment $(8$ marks$).$