A. what is the projection of the vector [ 4,2,-1] onto the line spanned by [ 1,1,1]

B. what is the projection of the vector [ 2,0,-1,1] onto the space spanned by the orthogonal vectors [ 3,1,0,-2] and [ -1,1,3,-1]

C. What are the coefficients needed to express the vector you found in Part B as a linear combination of [ 3,1,0,-2] and [ -1,1,3,-1]