Given the following sensitivity analysis, which of the following statements is true? a. The investment is not justified if the annual net cash flow will be $500,000 or $600,000. b. The total amount to be invested is $3,050,000. c. Only an annual net cash flow of $700,000 will allow for a positive residual value. d. The annual net cash flow necessary to generate a positive net present value is above $700,000