Question accounting

A company is evaluating two alternative projects, B and C, each of which will cost $50,000. Project B is ion expected to generate f20,000 per annum for three years, and project C is expected to generate f15,000 per annum for four years. At the end of each project, assets will be sold for f10,000 relating to project B and E15,000 relating to project C. What is the payback period for each project? Project B 3 years, Project C 4 years O Project B 1.5 years, Project C 2.3 years O Project B 2.5 years, Project C 3.3 years Project B 2 years, Project C 2.3 years