help!!!!!!

Hi I need help on my econ assignment. Can someone help me???? My group is doing grapes.

Thanks again

why it is possible that price elasticities of demand for some goods or services vary among different groups of consumers (buyers) and therefore enable firms (sellers) to charge different prices to each group.

Now, think of and select a good or service, different from those discussed in that text. Discuss the determinants of price elasticity of demand that affect this good or service and how that facilitate price discrimination.

Janice spends her money on Pepsi and lemonade. The price of Pepsi increases. Discuss the income and substitution effects of this increase on the price of Pepsi, given that the price of lemonade remains unchanged. Base your discussion on your knowledge of the utility-maximization rule.

Economies of scale and diseconomies of scale cause the average total cost (ATC) curve to be U-shaped. Discuss the factors that explain the existence of economies of scale.

Given the same costs, the monopolist produces less output and charges a higher price compared to the purely competitive industry. What makes this possible for the monopolist and not the purely competitive industry? What is the impact on the society of each?

	Discuss the differences and similarities between monopolistic competition and pure competition. How do the factors that determine resource demand differ from those that determine product demand?

Thank you!!!!!!!!!!!!!!!!!!!!