Please show work and don't use excell

Consider the following cash flow. Year 0: -100, Year 1: 240, year 2: -143

Unless the problem asks a different question or pro- different data: (1) determine how many roots vides are possible and (2) graph the PW versus the interest rate to see whether multiple roots occur. If unique IRR, it is the project's rate of return. If there are multiple roots, then use an external investing rate of 12% and an external borrowing rate of 6%. Compute and use the MIRR as the project's rate of return th a rate of