I am struggling a bit with NPV. I have done these in the past and can't get these to calculate this time around.

Project A has the following cash flows:

Starting: -1,000 / Yr 1: 150 / Yr 2: 300 / Yr 3: 350 / Yr 4: 750

Project B has the following cash flows:

Starting: -1,000 / Yr 1: 1,000 / Yr 2: 100 / Yr 3: 150 / Yr 4: 50

The discount rate is 9.2%, and both projects have the same risk as the firm's average project. Calculate each project's NPV.

Thanks!!