Find the magnitude of vector ` vec a=(3 hat k+4 hat j)xx( hat i+ hat j- hat k)dot`

Explanation

To find the magnitude of the vector cross product \(\vec{a} = (3\hat{k} + 4\hat{j}) \times (\hat{i} + \hat{j} - \hat{k})\), we will follow these steps:

### Step 1: Identify the vectors
Let:
\[ \vec{a} = 3\hat{k} + 4\hat{j} \]
\[
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