Hello, Kindly help m,e answer this problem solving about Profit Maximization in Managerial Economics. Kindly provide clear solution.

4. For a given company: (1) Compute the PV of a preferred stock that pays, in perpetuity, an annual cash flow of Php200 (million) at an annual interest rate of 5% (2 points); and (2) Compute the PV of a perpetual bond that pays a monthly cash flow of Php1,000 at an annual interest rate of 12% (2 points). 5. Illustrate in appropriate diagram (change in demand or change in supply) the impact on the good or service of the following events: (3 points each) A. Nominal income of consumers rise and potatoes are considered inferior goods B. Buyers of gold expect that the price of gold will decrease in the near future C. Producers of gold expect that the price of gold will rise in the near future D. Longer and more occurrences of strong typhoons affected the country's major agriculture crops E. Population increases affecting the market for automobiles