Answer:
see below
Explanation:
The graph of the first inequality is the half-plane above and including the x-axs.
The graph of the second inequality will be the half-plane below the dashed line y = x.
The graph of the third inequality will be the half-plane below the dashed line y = 6 -x.
So, the solution space will be a triangle above the x-axis and below the two (dashed) lines that cross at (x, y) = (3, 3).