Answer:
The image is missing, but let's answer it in a general case.
A) the magnitude of the vector axb is equal to:
IaI*IbI*sin(a)
Where a is the angle between the vectors a and b.
B) the direction of this vector will be perpendicular to both vectors a and b.
You can find the direction by pointing your hand in the direction of a, and the palm of your hand in the direction of b, now your thumb is pointing in the direction of the vector axb.
