the xy-plane shows a graph of the solutions to a system of inequalities if a and b are positive integers, the system consists of which inequalities?

The system of inequalities would be:

x ≥ 0
y ≥ 0
x ≤ a
y ≤ b

The xy-plane shows a graph of the solutions to a system of inequalities. If a and b are positive integers, the system consists of which inequalities?