QUESTION 5 Consider the following PPF. If you cannon view the image, you may view the picture by opening this file Computus 120 TA Day 100 80 60 C 40 D E 20 D 50 10o 150 200 250 300 O CARS PER DAY Which of the following points are efficient? Select all that apply. O B OC OD DE QUESTION 6 The use of theory and observation is more difficult in economics than in sciences such as physics due to the difficulty in a. formulating theories about economic events. O b. analyzing available data O c. applying mathematical methods to economic analysis. O d. performing an experiment in an economic system