This economics assignment solution addresses three key areas: monopoly pricing strategies, market equilibrium analysis, and financial return calculations. The first section examines a monopolist operating in both home and foreign markets, analyzing demand functions, profit maximization under uniform and differential pricing, and price elasticity. The second section focuses on market equilibrium, finding equilibrium price and quantity, determining optimal solar panel quantity, and calculating deadweight loss due to externalities. The final section covers financial concepts such as simple annual return, effective rate of return, and present value calculations, including a valuation of a company based on its earnings. The assignment provides detailed calculations and explanations for each part, demonstrating a strong understanding of economic principles and their application in real-world scenarios. References from various academic publications are also included.