8. There are two menus, Korean and Western, in the cafeteria that the same students use every day. According to the analysis of consumption trends, the probability that a student who eats Korean will eat Korean food again the next day is 0.7 and the probability of changing to Western food is 0.3. While, the probability that a student who eats Western will eat Western food again the next day is 0.8 and the probability of changing to Korean food is said to be 0.2. One day, sales of Korean food are x and sales of Western food are xz. Assuming that (71.42) is the expected sales volume for Korean and Western foods to be sold the next day, formulate the relationship established between (x1,x2) and (yvyn) using a matrix operations. Assuming that (21,22) is the expected sales volume two days after (x1,x2) is sold, formulate the relationship established between (x1, x2) and (21,22) using a matrix operations. 3 Compute the expected sales volume after 10 days when xy = 40, X2 = 60