Please help me to answer step by step. And write it down on paper.

3. Ned wants to fly his plane due north at 350 km/h relative to the ground. If a 70 km/h wind is blowing from the north-west, what velocity in the air should he fly his plane? Give your answer in terms of the unit vectors i and j, where north corresponds to the positive y direction. Enter your next step here ( ) trig L ab6' Find the cross product of a = 4i + 2] - 5k and b = 33' - 5] + k. Write your answer in terms of the standard basis vectors i,j and k. a X b : Emer your next step here