The vector product of vectors a⃗ and b⃗ has magnitude 12.0 m2 and is in the +z-direction. vector a⃗ has magnitude 4.0 m and is in the −x-direction. vector b⃗ has no x-component. part a: what is the magnitude of vector b⃗ ? (i solved this question the answer is 3 and it's correct)part b: what is the direction angle θ of vector b⃗ measured from the +y-direction to the +z-direction? (this is the part that i didn't get it correct)