Consider the following variation of Example 5.1.1. Marbles are randomly drawn one at a time from a jar initially containing a known equal number of red and white marbles. At each draw, the marble drawn is replaced by one of the opposite color. For example, if there are initially two reds and two whites and the first draw is red, then the red marble is replaced by a white marble so the jar now contains one red and three whites. Assume that there are initially one red marble and one white marble and the game stops after five draws. Find the filtration of the experiment