Im assuming you understand the other 2 parts so,
NPV = -13m + 5.2m x PVIFA(10%,3) + 8.2m/1.1^4 + 6.9m/1.1^4 = 10.25m = D
-13m is initial outlay, 5.2m is the cash flow from t=1 to t=3, and 8.2m is t=4 cash flow.
the after tax salvage value is 6.9m which you receive at t=4 as well, so you have...