а. Define ecоnоmies оf scаle аnd provide an example. (5 points) b. Define economies of scope and provide an example. (5 points) c. Define economies of learning (also known as: the learning curve) and provide an example. (5 points) d. Using one of the economies listed above, explain why a food truck that specializes in making tacos might choose to put burritos on its menu. (2 points)