a. False, as in monopolistic competition there are no restrictions for entry, other firms can enter the market easily, and in the long-term period all firms are making 0 economic profit. b. False, as price discrimination involves market segmentation which allows to charge a higher price to the segment with low elasticity. With more firms in the industry, it is harder to negotiate the agreements, moreover, with low entry barriers you cannot keep the high price for too long as such profit attracts potential rivals.
In monopolistic competition firms are trying to differentiate their products and advertisement is the way to achieve the Marketing differentiation.
The firm would operate at point q2 as the market is in the long-run ...