Problem 1 Write down your answers on paper using a pen or pencil. Otherwise, you will get zero point. Please show your work in detail. List all the necessary steps. We have two boxes. The Örst box contains two green balls and eight red balls. The second contains four green balls and Öve red balls. Bob selects one of the boxes at random. Then he selects a ball from that box at random. If he has a red ball, what is the probability that he selected a ball from the Örst box.