A. Yesterday, Kelly went to the Sea Animal Park on a class trip. The Sea Animal Park had a total of 3,840 visitors for the first 3 weeks of the month. There were 1,368 visitors the first week and 1,277 visitors the second week. What was the number of visitors for the third week? Show your work. B. During the first 3 weeks, 18 buses full of stừdents visited the Sea Animal Park. Each bus had 54 students. What is the total number of students that visited the Sea Animal Park during the 3 weeks? Explain how you found your answer.

C. Yesterday, on Kelly's class trip, 4 groups of 52 students visited the Sea Animal Park. The students attended a special dolphin show in which they were able to pet the dolphins. The students were placed in groups, with 7 students in each group. Kelly used division to find the total number of groups that were needed so that each student was able to pet the dolphins. She said that a total of 29 groups were needed. Did Kelly correctly solve the division problem? Why or why not?