need help walking through the problem i worked through it just dont understand

39. Innis Investments manages funds for a number of companies and wealthy clients. The in- vestment strategy is tailored to each client's needs. For a new client, Innis has been autho- rized to invest up to $1.2 million in two investment funds: a stock fund and a money market fund. Each unit of the stock fund costs $50 and provides an annual rate of return of 10%, each unit of the money market fund costs $100 and provides an annual rate of return of 4%. The client wants to minimize risk subject to the requirement that the annual income from the investment be at least $60,000. According to Innis's risk measurement system, each unit invested in the stock fund has a risk index of 8, and each unit invested in the money market fund has a risk index of 3; the higher risk index associated with the stock fund simply indicates that it is the riskier investment. Innis's client also specifies that at least $300,000 be invested in the money market fund. Determine how many units of each fund Innis should purchase for the client to mini- mize the total risk index for the portfolio. b. How much annual income will this investment strategy generate? c. Suppose the client desires to maximize annual return. How should the funds be invested? temulations a. didel