Can tou help me solving this excercise? Thank you so much

Exercise 10 Proposal A and proposal B require an initial investment of $10,000 and are expected to generate an equal cash inflow of $20,000 over their life of four years. The net cash inflow for each year of life of both the proposals is given below: Year Project A Project B 1 2,000 8,000 2 4,000 I 6,000 3 6,000 4,000 4. 8,000 2,000 Total 20,000 20,000 Which of the two proposals is better if compared using Net present value method