\"Instead of attending microeconomics class for two hours, Kiki could have played tennis, listened to music, or watched a movie. Therefore, the opportunity cost of attending the class is the tennis, music and the movie she had to give up.\" Is the above analysis correct or not? Explain your answer. (10 marks) \"Both rich and poor people experience scarcity.\" Is this statement correct? Explain your answer. (8 marks) David is an Italian cuisine restaurant owner. His restaurant usually opens for dinner because he targets the customers with high-spending power. On average, the customers will spend HK$800 I-IK$1,200 per person. At the same time, he nds that several new Italian restaurants operate near his restaurant. In order to increase the revenue, he plans to open for lunch. As David knows that you are taking the course of microeconomics, he asks you to help him make the decision. Please use the concepts you learned in costs to analyze whether David's restaurant should open for lunch. (15 marks)