Help in answering the following economics questions.

(i) Explain what is meant by second-degree price discrimination. [1] (ii) Draw, and briefly explain, a diagram to illustrate the circumstances in which a firm would choose to undertake second-degree price discrimination. On your diagram include an average cost curve (label this AC), a marginal cost curve (MC). an average revenue curve (AR) and a marginal revenue curve (MR). [3] [Total 4]In order to value the benefits in a final salary pension scheme as at 1 January 2005, a salary scale s, has been defined so that s,4, /s, is the ratio of a member's total earnings between ages x +/ and x + +1 to the member's total earnings between ages x and x + 1. Salary increases take place on 1 July every year. Ross, whose date of birth is 1 October 1973, has an annual salary rate of $30,000 on the valuation date. Write down an expression for Ross's expected earnings during 2005. [2]