Good afternoon that it is analytical geometry hayo need to know how the equation of the parabola when I'm given an equation of the line and a circle. and give me a focus

The exercise says Intersept the line with the circle .. the line is x-2y +4 = o the equation of the circle can not remember what was and focus on (3.4) find the equation of the parabola. how do I resorverlo. I hope for your reply. thanks