QRS Ltd. is evaluating two projects, Project Ocean and Project River, requiring initial investments of SGD 250,000 each. The cash flows are:

Year	Cash Flows (Project Ocean)	Cash Flows (Project River)
Initial Investment	(250,000)	(250,000)
1	90,000	80,000
2	80,000	90,000
3	70,000	80,000
4	60,000	70,000

a. Determine the Net Present Value (NPV) for both projects assuming a discount rate of 6%.

b. Based on the NPV, which project should be undertaken?