Suppose `veca` is a vector of magnitude 4.5 unit due north. What is the vector `-4 veca`?

Explanation

To solve the problem, we need to find the vector \(-4 \vec{A}\) given that \(\vec{A}\) is a vector of magnitude 4.5 units directed due north.

### Step-by-Step Solution:

1. **Identify the given vector**:
We have a vector \(\vec{A}\) with a magnitude of 4.5 units directed due north. This can be represented as:
\[
\vec{A} = 4.5 \, \text{units} \, \text{(north)}
...