The vectors are and
.
The cross product produce a vector orthogonal to both.
\.
.
.
The length of the vector is
.
.
The unit vector is .
.
.
Therefore, the unit vector is .
The vectors are and
.
.
.
.
The magnitude of the vector is .
.
The unit vector is .
.
.
Therefore, the unit vector is .
The unit vectors are and
.