three brothers koffi , konan , kouadio are living in a neigborhood with a secret place . the three brothers have diffenrent propensities to lie . koffi tells the truth 20 % of the time , konan lies with a probability of 0.5 , kouadio is the memost honest of the family telling the truth 90 % of the time . A young lady comes accross the neighborhood lookingfor the secret place she meets one of the 3 brothers and she receives the right information about the location of the secret place . What is the probabilty that she talked to koffi . draw a priori and a posteriori diagram