Please help me explain thoroughly about the solution of this task. Thank you.

11. The following table shows the number of tourists by country who visited Jeju and Ulleungdo in 2015. (Unit: 10,000 people) Jeju Island Ulleungdo Republic of Korea 179 20 China 244 9 Japan 95 5 (a) Of those who visited Jeju Island in 2015, 10% predict that they will visit Jeju Island again in 2016, and 3% of those who visited Ulleungdo will visit Ulleungdo again. 179 20 0.1 0.1 0 A = 244 9 B = 0.03 0 0.03 95 5 Find AB, AC and explain what each term means. (b) The number of visitors to Jeju and Ulleungdo in 2016 is projected to increase by 10% in Korea, 20% in China and 8% in Japan compared to 2015. 1.1 0 0 B = 1.1 1.2 1.08 , C= 0 1.2 0 0 0 1.08 Find BA and CA and explain what each term means