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4) A Survey was conducter among household of 4 peaple to find out their miek concumption over over 1 month. It is ossumat that out of oll cespondents, consumption hos a "normol" distribution worth an avoroze of 20 liters and row standard devication of 5 liter. As part of on a therticing. Campaign, 1) The percontoge of low consumand (Less than 10 Liters per month). 2) The percentage if large confumiers (moro than 30 litiors per month), 3) The on aximum convumption if 50 of consermars. 4) Above what lassemption are 33\% if consumors