can someone answer this question?

The Case of Extra Change Lisa is a full-time mother taking care of three active children. One particularly busy afternoon, Lisa decides that she does not have time to cook for herself and her children, or sit down to eat in a restaurant. With her three children in the car, Lisa decides to use the drive-through lane at her neighborhood fast-food restaurant. Since it is a Friday, the restaurant is very busy. There is a long queue at the drive-through. Her children start to feel restless due to the long wait and begin to throw tantrums. Lisa finds it difficult to concentrate with all the commotion, as she tries to keep her children quiet. When her turn comes, Lisa quickly places her orders and they amount to RM16. Lisa gives the cashier an RM20 note. Due to the restaurant being so busy, the cashier mistakes Lisa's RM20 note for an RM50 note. Instead of returning RM4 in change to Lisa, the cashier mistakenly hands her RM34. Although Lisa realizes that the cashier has made a mistake, she is in a hurry, so she drives away. A. Discuss the action that need to be undertaken in Lisa's case. (6 Marks) B. Deliberate whether Lisa's action is considered to be appropriate. (6 Marks)