Hello i need help with the following question please and thank you

1.) You are given the vector A = 2.0i + 3.0j - 1.0k (a) Find the magnitude of A. (b) Find the angle A makes with the x-y plane. (c) Find the angle A makes with the z-axis. (d) Find A. 2.) (a) Prove that for any three vectors A, B, and C, that A . (B x C) = (A x B) .C. (b) Calculate ( Ax B) .C for the three vectors A with a magnitude A| = 5.00 and angle GA = 26.0 measured from the +x axis toward the ty axis, B with |B) = 4.00 and OB = 63.0 measured from the +x axis, and C with |C) = 6.00 and in the +z direction. Vectors A and B are in the xy-plane