4. (20 points) Explain by means of an example what a linguistic variable is. Define fuzzy sets for that variable, draw their figures and define their universe of discourse. Intersection: Tom is tall and average tall men= {0/165,0/175,0/180,0.25/1 82.5,0.5/185, 1/1 90} average men= {0165,1/175,0.5/180,0.25/182.5,0/185,0/ 190}