Greetings, I need help! In a black bag we have the following balls and they will be taken out one by one without return A What is the probability of drawing two black balls in a row? Now we put all the balls back in the bag and start again B What is the probability of drawing two yellow balls in a row? Now we put all the balls back in the bag and start again C. What is the probability of drawing a blue ball and then a yellow ball? Now we put all the balls back in the bag and start again D. What is the probability of drawing a green ball and then a red ball?