at a time when demand for ready to eat cereal was stagnant, a spokesperson for the cereal maker Kellogg's was quoted as saying for the past several years our individual company growth has come out of the fellow's hide. Kellogg's has been producing cereal since1906and continues to implement strategies that maje it a leader in the cereal industry. support that when Kellogg's and its largest rival advertise, each company earns $1billion in profits. when neither company advertises, each company earns profits of $13billion. if one company advertises and the other does not, the company that advertises earns #49billlion and the company that does not advertise loses #1billion . for what range of interest rates could these firms use trigger strategies to support the collusive level of advertising? enter your response as a percentage rounded to the nearest whole number