50 housekeepers were asked on what detergent soap they prefer in washing clothes.Here is the summary of their responses: 20 like brand A , 24 like brand B , 30 like brand C , 8 like both brand A&B , 11 like both A&C , 17 like both B&C , 6 like all three. 1) How many like brand A only? Brand B only? Brand C only? 2) How many do not like any of the three brands?