Cash flow and Economic Equivalence 1- Each year a leading oil company expends large amounts of funds for mechanical safety features throughout its worldwide operations. The lead engineer of operations, plans expenditures of 1SR million now and each of the next 5 years just for the improvement of field-based pressure release valves. Construct the cash flow diagram to find the equivalent value of these expenditures at the end of year 4, using a cost of capital estimate for safety-related funds of 10% per year.