1. On the coordinate plane, lines of the form $y=a x+b$ are drawn, where $a$ and $b$ are natural numbers from 1 to 9. Among all the intersection points of these lines, select the point with the greatest sum of coordinates. Write the answer in the form $(x ; y)$.
Answer: $(8 ; 73)\|(8,73)\| 8 ; 73 \| 8,73$