Given point P (-2, 6, 3) and vector A = yax (x, z), express P and A in cylindrical and spherical coordinates.

a) P: (2, 3, π/6), A: (r, φ, z)
b) P: (6, π/6, π/3), A: (r, φ, z)
c) P: (6, π/3, π/6), A: (r, φ, z)
d) P: (r, φ, z), A: (2, 3, π/6)