Q: Italy restaurant in Rome consider to create new item on menu it consists of fishprepared in italy

Q: Italy restaurant in Rome consider to create new item on menu it consists of fishprepared in italy in italy way but japanese spices such as fusion cuisine they wat toget idea if customers like this menu item,what are the advantages and disadvantages way to find out the following questionsa)use random sample to send survey existing customers ?b)convenience sample top send survey , existing and people who are notcustomers?c)semi-structured interview with people who have not tasted fish yet?d)semi-structured interview with people who have tasted fish already?e)focused group , how focus group can be use for this purpose?f)design experiment which a control group get fishwithout japanese spices and another group get fish with japanese spices ?g)let japanese experts decide how good fish with japanese spices is ?