Provide brief responses to the following questions. Al For each of the following statements indicate whether the statement is true or false and explain why. ) The internal rate of return eliminates the need to calculate the required rate of return. b) Two sign reversals in the cash flow stream is a necessary and sufficient condition for two internal rates of return. For an individual project, using a discount rate higher than the internal rate of return of a project will result in a negative net present value. c) d) If a firm accepts a zero net present value project then the value of the firm may increase or decrease depending on whether the project's internal rate of return was how high or low