4. Project Y costs $50,000, its expected cash inflows are as follows--year 1: $19,000; year 2: $20,000; year 3: $18,000; year 4: $19,000; year 5 $20,000; year 6: $17,000, and its WACC is 7%. a. What is the project's NPV? b. What is the project's IRR? c. What is the project's MIRR? d. What is the project's Payback Period? e. What is the project's Discounted Payback