secondary 4 chevron_right E Maths chevron_right Singapore

Hi for qn24a I am confused about the many ways that the line can be drawn since there is only one point of intersection(y=5)because in the next question I’m asked to write the coordinates for the point of intersection with the other line and since there is only one point of intersection(y=5) how am I supposed to draw the line?? So that I can get the correct coordinates for qn 24b? Someone please help me thank you so much