\fQuestion 4 {1.25 points] In the short run, product differentiation enables firms in monopolistically competitive markets to: O produce a good for which there are exact substitutes. O produce a good which is standardized; 0 price the good at marginal cost. 0 earn a positive economic profit. Question 8 {1.25 points] Economists generally believe that: 0 competition encourages innovation. 0 innovation encourages competition. 0 innovation leads to market power and should be regulated. 0 market power leads to innovation