$.$ The first task is to apply the text manipulation skills from CH$5$ to break up column B into County and State. Insert three columns after column B and follow the instructions below: a$.$ Column C: use the FIND$()$ function to find the location of comma in column B$.$ b$.$ Column D: use LEFT$()$ and other functions to extract only county name from column B$.$ Make sure $($a$)$ the function$($s$)$ reference column C$,$ and $($b$)$ there is no leading and trailing space in the result. c$.$ Column E: use RIGHT $()$ and other functions to extract only state name from column B$.$ Make sure $($a$)$ the function$($s$)$ reference column C$,$ and $($