These are 4 point questions - 5% of the exam ... so read the question VERY carefully:

Use wiz wheel to find groundspeeds …..

D = 350nm, O = 103kt, H = 156kt

Distance to PET = DH / (O+H) = 350 x 156 / (103 + 156) = 210.8nm

Time to PET = distance / speed out = 210.8 / 103 = 2.047hr = 122.8 mins