IF `vecA = (2 hati + hatj)` and ` vecB = hati - hatj + 5 hatk ` find ` (i) vecA xx vecB ` (ii ) angle between ` vecA and vecB ` (iii ) unit vector perpendicular to ` vecA and vecB .`

Explanation

To solve the problem step by step, we will find the cross product of vectors A and B, the angle between them, and the unit vector perpendicular to both.

### Given:
- \( \vec{A} = 2 \hat{i} + \hat{j} \)
- \( \vec{B} = \hat{i} - \hat{j} + 5 \hat{k} \)

### Step 1: Find \( \vec{A} \times \vec{B} \)

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