Find the coordinates of points on the parabola `y^2=8x` whose focal distance is `4.`

Explanation

To find the coordinates of points on the parabola \( y^2 = 8x \) whose focal distance is \( 4 \), we can follow these steps:

### Step 1: Identify the parameters of the parabola
The given equation of the parabola is \( y^2 = 8x \). We can compare this with the standard form of a parabola \( y^2 = 4ax \).

From the equation \( y^2 = 8x \), we can see that:
\[
4a = 8 \implies a = 2
...