Construct a `3 xx2`matrix whose elements are given by `a_(i j)=1/2|i-3j|`.

Explanation

To construct a \(3 \times 2\) matrix whose elements are given by \(a_{ij} = \frac{1}{2}|i - 3j|\), we will follow these steps:

### Step 1: Define the matrix structure
We need to create a matrix \(A\) with 3 rows and 2 columns. The elements of the matrix will be denoted as follows:
\[
A = \begin{bmatrix}
a_{11} & a_{12} \\
a_{21} & a_{22} \\
...