$\"\"$

The vector is $\"\"$ .

The dot product of vectors $\"\"$ .

Consider $\"\"$ .

$\"\"$

Substitute $\"\"$ and $\"\"$ in the above equation.

$\"\"$

For all the values of $\"\"$ and $\"\"$ satisfying the equation $\"\"$ is the vector $\"\"$ .

Let $\"\"$ and $\"\"$ .

$\"\"$

Therefore one of the solution is $\"\"$ .

$\"\"$

One of the solution is $\"\"$ .