Which of the following best The diagram below shows the market for 5G mobile phones. Which of the following events might have caused the shift in the demand curve? Shift in demand curve.gif Group of answer choices An increase in advertising expenditure by phone companies The entry into the market of a major new 5G supplier none is correct 5G phone suppliers take advantage of economies of scale An increase in interest ratesdescribes the law of supply? Group of answer choices As price increases, quantity supplied increases. Supply is infinite. Legal authorities regulate markets. Sellers set the price that demanders pay. Producers sell the same amount of a good no matter its price