solve without excel please!

Question 4 (15 points) Consider the following information for project A and B. Assume the cost of capital is 15%. Year A B 0 -50,000 -80,000 1 15.625 0 2 15.625 0 3 0 4 15,625 15,625 15,625 0 5 140,000 3. Calculate for each project the payback period, NPV and the IRR b. Would you accept the projects? Assume the projects are independent and the upper bound is 4 years