can someone please help me answer this question and show all working clearly so i can follow along

For the given vectors, u = (2, -3, 1), v1 = (1, 2,0), v2 = (1, -1, 1), 1. find the orthogonal projection of the vector u onto the plane spanned by the vectors v1 and va; 50 marks] 2. represent the projection vector found in item 1 as a linear combination of V1 and v2. [10 marks]