Let the two fuzzy sets A = {x is considerably larger than lo} and B = {x is approximately l l} be defined by the following membership functions:
a. Sketch the graphs of these fuzzy sets, and draw the graphs of a fuzzy set C = {x is considerably larger than 10 AND x is approximately 11}; and a fuzzy set D = {x is considerably larger than 10 OR x is approximately 11}.
b. Express analytically the membership functions μC and μD.