you are considering purchasing a small office building for $1,675,000. the expected first year potential gross income is $480,000 with a vacancy loss equal to 15% of the pgi. operating expenses and capital expenditures are expected to be 40% and 5% of the EGI respectively. the mortgage on the property is 75% LTV at a 6% interest rate with a 20-year term with monthly compounding. A. what is the required equity investment (required down payment)? B. estimate NOI, the debt service paid in a year and the before tax cash flow