Ai met with new client and initiated the portfolio management process by first establishing the client's investment objectives and constraints. The client is a 55-year-old corporate executive. He has paid off his mortgage; his children have completed their post-secondary education; and he intends to retire at age 65. Identify an investment objective that is most pertinent to his situation. Explain the terms with example: Income., Tax minimization, Liquidity and  Diversification