A market Researcher investigating consumers preferences for three brands of cooking fats namely kasuku, kimbo & cowboy gathered the following information. From a sample of 800 households, 230 used kasuku 245 used kimbo and 325 used cowboy. 30 household used all three regularly, 70 used kasuku and cowboy, 110 used kasuku only, 185 used cowboy only;

1. Represent the above information in a Venn diagram.
2. Find number of households that used Kasuku and Kimbo only
3. Number of households who used Kimbo & cowboy only
4. Number of households who used none of the above brands.